Reland of Moving webrtc.gni up one level from build/ (patchset #1 id:1 of https://codereview.webrtc.org/2657563002/ )

Reason for revert:
Starting to work on a fix (it seems that there are third_party dependencies that depends on the path to the webrtc.gni file)

Original issue's description:
> Revert of Moving webrtc.gni up one level from build/ (patchset #1 id:1 of https://codereview.webrtc.org/2651543003/ )
>
> Reason for revert:
> This was causing the following failure: https://build.chromium.org/p/chromium.webrtc.fyi/builders/Android%20Builder/builds/838/steps/generate_build_files/logs/stdio
>
> Original issue's description:
> > Moving webrtc.gni up one level from build/
> >
> > BUG=webrtc:7030
> >
> > Review-Url: https://codereview.webrtc.org/2651543003
> > Cr-Commit-Position: refs/heads/master@{#16241}
> > Committed: https://chromium.googlesource.com/external/webrtc/+/35a32700fc9b5d932ddbd528c12f59c3274e4774
>
> TBR=kjellander@webrtc.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=webrtc:7030
>
> Review-Url: https://codereview.webrtc.org/2657563002
> Cr-Commit-Position: refs/heads/master@{#16244}
> Committed: https://chromium.googlesource.com/external/webrtc/+/69dc7dbe247ead087f3bae0eb7e23f27f0de1ec3

TBR=kjellander@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:7030

Review-Url: https://codereview.webrtc.org/2654773002
Cr-Commit-Position: refs/heads/master@{#16247}
diff --git a/BUILD.gn b/BUILD.gn
index 62e06ad..4e6816f 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -6,7 +6,7 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-import("webrtc/build/webrtc.gni")
+import("webrtc/webrtc.gni")
 
 group("default") {
   testonly = true
diff --git a/webrtc/BUILD.gn b/webrtc/BUILD.gn
index c3ff51d..d99dc4d 100644
--- a/webrtc/BUILD.gn
+++ b/webrtc/BUILD.gn
@@ -10,7 +10,7 @@
 
 import("//build/config/linux/pkg_config.gni")
 import("//build/config/sanitizers/sanitizers.gni")
-import("build/webrtc.gni")
+import("webrtc.gni")
 import("//third_party/protobuf/proto_library.gni")
 if (is_android) {
   import("//build/config/android/config.gni")
diff --git a/webrtc/api/BUILD.gn b/webrtc/api/BUILD.gn
index af49219..038766a 100644
--- a/webrtc/api/BUILD.gn
+++ b/webrtc/api/BUILD.gn
@@ -6,7 +6,7 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-import("../build/webrtc.gni")
+import("../webrtc.gni")
 if (is_android) {
   import("//build/config/android/config.gni")
   import("//build/config/android/rules.gni")
diff --git a/webrtc/audio/BUILD.gn b/webrtc/audio/BUILD.gn
index 9ded96f..80d5416 100644
--- a/webrtc/audio/BUILD.gn
+++ b/webrtc/audio/BUILD.gn
@@ -6,7 +6,7 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-import("../build/webrtc.gni")
+import("../webrtc.gni")
 
 rtc_static_library("audio") {
   sources = [
diff --git a/webrtc/audio/utility/BUILD.gn b/webrtc/audio/utility/BUILD.gn
index df5f322..2ef5eba 100644
--- a/webrtc/audio/utility/BUILD.gn
+++ b/webrtc/audio/utility/BUILD.gn
@@ -5,7 +5,7 @@
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
-import("../../build/webrtc.gni")
+import("../../webrtc.gni")
 
 group("utility") {
   public_deps = [
diff --git a/webrtc/base/BUILD.gn b/webrtc/base/BUILD.gn
index 248ef13..13ad5fd 100644
--- a/webrtc/base/BUILD.gn
+++ b/webrtc/base/BUILD.gn
@@ -8,7 +8,7 @@
 
 import("//build/config/crypto.gni")
 import("//build/config/ui.gni")
-import("../build/webrtc.gni")
+import("../webrtc.gni")
 
 if (is_android) {
   import("//build/config/android/config.gni")
diff --git a/webrtc/build/webrtc.gni b/webrtc/build/webrtc.gni
index d179ed4..04bab46 100644
--- a/webrtc/build/webrtc.gni
+++ b/webrtc/build/webrtc.gni
@@ -1,4 +1,4 @@
-# Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
+# Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
@@ -6,320 +6,4 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-import("//build/config/arm.gni")
-import("//build/config/features.gni")
-import("//build/config/mips.gni")
-import("//build/config/sanitizers/sanitizers.gni")
-import("//build_overrides/build.gni")
-import("//testing/test.gni")
-
-declare_args() {
-  # Disable this to avoid building the Opus audio codec.
-  rtc_include_opus = true
-
-  # Enable this to let the Opus audio codec change complexity on the fly.
-  rtc_opus_variable_complexity = false
-
-  # Disable to use absolute header paths for some libraries.
-  rtc_relative_path = true
-
-  # Used to specify an external Jsoncpp include path when not compiling the
-  # library that comes with WebRTC (i.e. rtc_build_json == 0).
-  rtc_jsoncpp_root = "//third_party/jsoncpp/source/include"
-
-  # Used to specify an external OpenSSL include path when not compiling the
-  # library that comes with WebRTC (i.e. rtc_build_ssl == 0).
-  rtc_ssl_root = ""
-
-  # Selects fixed-point code where possible.
-  rtc_prefer_fixed_point = false
-
-  # Enables the use of protocol buffers for debug recordings.
-  rtc_enable_protobuf = true
-
-  # Disable the code for the intelligibility enhancer by default.
-  rtc_enable_intelligibility_enhancer = false
-
-  # Enable when an external authentication mechanism is used for performing
-  # packet authentication for RTP packets instead of libsrtp.
-  rtc_enable_external_auth = build_with_chromium
-
-  # Selects whether debug dumps for the audio processing module
-  # should be generated.
-  apm_debug_dump = false
-
-  # Set this to true to enable BWE test logging.
-  rtc_enable_bwe_test_logging = false
-
-  # Set this to disable building with support for SCTP data channels.
-  rtc_enable_sctp = true
-
-  # Disable these to not build components which can be externally provided.
-  rtc_build_expat = true
-  rtc_build_json = true
-  rtc_build_libjpeg = true
-  rtc_build_libsrtp = true
-  rtc_build_libvpx = true
-  rtc_libvpx_build_vp9 = true
-  rtc_build_libyuv = true
-  rtc_build_openmax_dl = true
-  rtc_build_opus = true
-  rtc_build_ssl = true
-  rtc_build_usrsctp = true
-
-  # Enable to use the Mozilla internal settings.
-  build_with_mozilla = false
-
-  rtc_enable_android_opensl = false
-
-  # Link-Time Optimizations.
-  # Executes code generation at link-time instead of compile-time.
-  # https://gcc.gnu.org/wiki/LinkTimeOptimization
-  rtc_use_lto = false
-
-  # Set to "func", "block", "edge" for coverage generation.
-  # At unit test runtime set UBSAN_OPTIONS="coverage=1".
-  # It is recommend to set include_examples=0.
-  # Use llvm's sancov -html-report for human readable reports.
-  # See http://clang.llvm.org/docs/SanitizerCoverage.html .
-  rtc_sanitize_coverage = ""
-
-  # Enable libevent task queues on platforms that support it.
-  if (is_win || is_mac || is_ios || is_nacl) {
-    rtc_enable_libevent = false
-    rtc_build_libevent = false
-  } else {
-    rtc_enable_libevent = true
-    rtc_build_libevent = true
-  }
-
-  if (current_cpu == "arm" || current_cpu == "arm64") {
-    rtc_prefer_fixed_point = true
-  }
-
-  if (!is_ios && (current_cpu != "arm" || arm_version >= 7) &&
-      current_cpu != "mips64el") {
-    rtc_use_openmax_dl = true
-  } else {
-    rtc_use_openmax_dl = false
-  }
-
-  # Determines whether NEON code will be built.
-  rtc_build_with_neon =
-      (current_cpu == "arm" && arm_use_neon) || current_cpu == "arm64"
-
-  # Enable this to build OpenH264 encoder/FFmpeg decoder. This is supported on
-  # all platforms except Android and iOS. Because FFmpeg can be built
-  # with/without H.264 support, |ffmpeg_branding| has to separately be set to a
-  # value that includes H.264, for example "Chrome". If FFmpeg is built without
-  # H.264, compilation succeeds but |H264DecoderImpl| fails to initialize. See
-  # also: |rtc_initialize_ffmpeg|.
-  # CHECK THE OPENH264, FFMPEG AND H.264 LICENSES/PATENTS BEFORE BUILDING.
-  # http://www.openh264.org, https://www.ffmpeg.org/
-  rtc_use_h264 = proprietary_codecs && !is_android && !is_ios
-
-  # Determines whether QUIC code will be built.
-  rtc_use_quic = false
-
-  # By default, use normal platform audio support or dummy audio, but don't
-  # use file-based audio playout and record.
-  rtc_use_dummy_audio_file_devices = false
-
-  # When set to true, test targets will declare the files needed to run memcheck
-  # as data dependencies. This is to enable memcheck execution on swarming bots.
-  rtc_use_memcheck = false
-
-  # FFmpeg must be initialized for |H264DecoderImpl| to work. This can be done
-  # by WebRTC during |H264DecoderImpl::InitDecode| or externally. FFmpeg must
-  # only be initialized once. Projects that initialize FFmpeg externally, such
-  # as Chromium, must turn this flag off so that WebRTC does not also
-  # initialize.
-  rtc_initialize_ffmpeg = !build_with_chromium
-
-  # Build sources requiring GTK. NOTICE: This is not present in Chrome OS
-  # build environments, even if available for Chromium builds.
-  rtc_use_gtk = !build_with_chromium
-}
-
-# A second declare_args block, so that declarations within it can
-# depend on the possibly overridden variables in the first
-# declare_args block.
-declare_args() {
-  # Include the iLBC audio codec?
-  rtc_include_ilbc = !(build_with_chromium || build_with_mozilla)
-
-  rtc_restrict_logging = build_with_chromium
-
-  # Excluded in Chromium since its prerequisites don't require Pulse Audio.
-  rtc_include_pulse_audio = !build_with_chromium
-
-  # Chromium uses its own IO handling, so the internal ADM is only built for
-  # standalone WebRTC.
-  rtc_include_internal_audio_device = !build_with_chromium
-
-  # Include tests in standalone checkout.
-  rtc_include_tests = !build_with_chromium
-}
-
-# Make it possible to provide custom locations for some libraries (move these
-# up into declare_args should we need to actually use them for the GN build).
-rtc_libvpx_dir = "//third_party/libvpx"
-rtc_libyuv_dir = "//third_party/libyuv"
-rtc_opus_dir = "//third_party/opus"
-
-# Desktop capturer is supported only on Windows, OSX and Linux.
-rtc_desktop_capture_supported = is_win || is_mac || is_linux
-
-###############################################################################
-# Templates
-#
-
-# Points to //webrtc/ in webrtc stand-alone or to //third_party/webrtc/ in
-# chromium.
-# We need absolute paths for all configs in templates as they are shared in
-# different subdirectories.
-webrtc_root = get_path_info("../", "abspath")
-
-# Global configuration that should be applied to all WebRTC targets.
-# You normally shouldn't need to include this in your target as it's
-# automatically included when using the rtc_* templates.
-# It sets defines, include paths and compilation warnings accordingly,
-# both for WebRTC stand-alone builds and for the scenario when WebRTC
-# native code is built as part of Chromium.
-rtc_common_configs = [ webrtc_root + ":common_config" ]
-
-# Global public configuration that should be applied to all WebRTC targets. You
-# normally shouldn't need to include this in your target as it's automatically
-# included when using the rtc_* templates. It set the defines, include paths and
-# compilation warnings that should be propagated to dependents of the targets
-# depending on the target having this config.
-rtc_common_inherited_config = webrtc_root + ":common_inherited_config"
-
-# Common configs to remove or add in all rtc targets.
-rtc_remove_configs = []
-rtc_add_configs = rtc_common_configs
-
-set_defaults("rtc_test") {
-  configs = rtc_add_configs
-  suppressed_configs = []
-}
-
-set_defaults("rtc_source_set") {
-  configs = rtc_add_configs
-  suppressed_configs = []
-}
-
-set_defaults("rtc_executable") {
-  configs = rtc_add_configs
-  suppressed_configs = []
-}
-
-set_defaults("rtc_static_library") {
-  configs = rtc_add_configs
-  suppressed_configs = []
-}
-
-set_defaults("rtc_shared_library") {
-  configs = rtc_add_configs
-  suppressed_configs = []
-}
-
-template("rtc_test") {
-  test(target_name) {
-    forward_variables_from(invoker,
-                           "*",
-                           [
-                             "configs",
-                             "public_configs",
-                             "suppressed_configs",
-                           ])
-    configs += invoker.configs
-    configs -= rtc_remove_configs
-    configs -= invoker.suppressed_configs
-    public_configs = [ rtc_common_inherited_config ]
-    if (defined(invoker.public_configs)) {
-      public_configs += invoker.public_configs
-    }
-  }
-}
-
-template("rtc_source_set") {
-  source_set(target_name) {
-    forward_variables_from(invoker,
-                           "*",
-                           [
-                             "configs",
-                             "public_configs",
-                             "suppressed_configs",
-                           ])
-    configs += invoker.configs
-    configs -= rtc_remove_configs
-    configs -= invoker.suppressed_configs
-    public_configs = [ rtc_common_inherited_config ]
-    if (defined(invoker.public_configs)) {
-      public_configs += invoker.public_configs
-    }
-  }
-}
-
-template("rtc_executable") {
-  executable(target_name) {
-    forward_variables_from(invoker,
-                           "*",
-                           [
-                             "deps",
-                             "configs",
-                             "public_configs",
-                             "suppressed_configs",
-                           ])
-    configs += invoker.configs
-    configs -= rtc_remove_configs
-    configs -= invoker.suppressed_configs
-    deps = [
-      "//build/config/sanitizers:deps",
-    ]
-    deps += invoker.deps
-    public_configs = [ rtc_common_inherited_config ]
-    if (defined(invoker.public_configs)) {
-      public_configs += invoker.public_configs
-    }
-  }
-}
-
-template("rtc_static_library") {
-  static_library(target_name) {
-    forward_variables_from(invoker,
-                           "*",
-                           [
-                             "configs",
-                             "public_configs",
-                             "suppressed_configs",
-                           ])
-    configs += invoker.configs
-    configs -= rtc_remove_configs
-    configs -= invoker.suppressed_configs
-    public_configs = [ rtc_common_inherited_config ]
-    if (defined(invoker.public_configs)) {
-      public_configs += invoker.public_configs
-    }
-  }
-}
-
-template("rtc_shared_library") {
-  shared_library(target_name) {
-    forward_variables_from(invoker,
-                           "*",
-                           [
-                             "configs",
-                             "public_configs",
-                             "suppressed_configs",
-                           ])
-    configs += invoker.configs
-    configs -= rtc_remove_configs
-    configs -= invoker.suppressed_configs
-    public_configs = [ rtc_common_inherited_config ]
-    if (defined(invoker.public_configs)) {
-      public_configs += invoker.public_configs
-    }
-  }
-}
+import("../webrtc.gni")
diff --git a/webrtc/call/BUILD.gn b/webrtc/call/BUILD.gn
index 195c37f..acad72d 100644
--- a/webrtc/call/BUILD.gn
+++ b/webrtc/call/BUILD.gn
@@ -6,7 +6,7 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-import("../build/webrtc.gni")
+import("../webrtc.gni")
 
 rtc_source_set("call_interfaces") {
   sources = [
diff --git a/webrtc/common_audio/BUILD.gn b/webrtc/common_audio/BUILD.gn
index 2d46f67..a3cf046 100644
--- a/webrtc/common_audio/BUILD.gn
+++ b/webrtc/common_audio/BUILD.gn
@@ -7,7 +7,7 @@
 # be found in the AUTHORS file in the root of the source tree.
 
 import("//build/config/arm.gni")
-import("../build/webrtc.gni")
+import("../webrtc.gni")
 
 config("common_audio_config") {
   include_dirs = [
diff --git a/webrtc/common_video/BUILD.gn b/webrtc/common_video/BUILD.gn
index 3b33bcc..1c13fa4 100644
--- a/webrtc/common_video/BUILD.gn
+++ b/webrtc/common_video/BUILD.gn
@@ -6,7 +6,7 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-import("../build/webrtc.gni")
+import("../webrtc.gni")
 
 config("common_video_config") {
   include_dirs = [
diff --git a/webrtc/examples/BUILD.gn b/webrtc/examples/BUILD.gn
index 6f7eaa7..dfe15d1 100644
--- a/webrtc/examples/BUILD.gn
+++ b/webrtc/examples/BUILD.gn
@@ -6,7 +6,7 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-import("../build/webrtc.gni")
+import("../webrtc.gni")
 if (is_android) {
   import("//build/config/android/config.gni")
   import("//build/config/android/rules.gni")
diff --git a/webrtc/logging/BUILD.gn b/webrtc/logging/BUILD.gn
index 792eb93..fd0caca 100644
--- a/webrtc/logging/BUILD.gn
+++ b/webrtc/logging/BUILD.gn
@@ -6,7 +6,7 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-import("../build/webrtc.gni")
+import("../webrtc.gni")
 import("//third_party/protobuf/proto_library.gni")
 if (is_android) {
   import("//build/config/android/config.gni")
diff --git a/webrtc/media/BUILD.gn b/webrtc/media/BUILD.gn
index 7f8a1f6..06aed45 100644
--- a/webrtc/media/BUILD.gn
+++ b/webrtc/media/BUILD.gn
@@ -7,7 +7,7 @@
 # be found in the AUTHORS file in the root of the source tree.
 
 import("//build/config/linux/pkg_config.gni")
-import("../build/webrtc.gni")
+import("../webrtc.gni")
 
 group("media") {
   public_deps = [
diff --git a/webrtc/modules/BUILD.gn b/webrtc/modules/BUILD.gn
index d87e7f9..e44b35f 100644
--- a/webrtc/modules/BUILD.gn
+++ b/webrtc/modules/BUILD.gn
@@ -6,7 +6,7 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-import("../build/webrtc.gni")
+import("../webrtc.gni")
 import("audio_coding/audio_coding.gni")
 
 group("modules") {
diff --git a/webrtc/modules/audio_coding/BUILD.gn b/webrtc/modules/audio_coding/BUILD.gn
index 044d57e..4046373 100644
--- a/webrtc/modules/audio_coding/BUILD.gn
+++ b/webrtc/modules/audio_coding/BUILD.gn
@@ -6,7 +6,7 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-import("../../build/webrtc.gni")
+import("../../webrtc.gni")
 import("audio_coding.gni")
 import("//build/config/arm.gni")
 import("//third_party/protobuf/proto_library.gni")
diff --git a/webrtc/modules/audio_coding/audio_coding.gni b/webrtc/modules/audio_coding/audio_coding.gni
index 13577f8..0f3a75f 100644
--- a/webrtc/modules/audio_coding/audio_coding.gni
+++ b/webrtc/modules/audio_coding/audio_coding.gni
@@ -6,7 +6,7 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-import("../../build/webrtc.gni")
+import("../../webrtc.gni")
 
 audio_codec_defines = []
 if (rtc_include_ilbc) {
diff --git a/webrtc/modules/audio_conference_mixer/BUILD.gn b/webrtc/modules/audio_conference_mixer/BUILD.gn
index b4705d5..428bcac 100644
--- a/webrtc/modules/audio_conference_mixer/BUILD.gn
+++ b/webrtc/modules/audio_conference_mixer/BUILD.gn
@@ -6,7 +6,7 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-import("../../build/webrtc.gni")
+import("../../webrtc.gni")
 
 config("audio_conference_mixer_config") {
   visibility = [ ":*" ]  # Only targets in this file can depend on this.
diff --git a/webrtc/modules/audio_device/BUILD.gn b/webrtc/modules/audio_device/BUILD.gn
index 4dc6760..ac8fdbe 100644
--- a/webrtc/modules/audio_device/BUILD.gn
+++ b/webrtc/modules/audio_device/BUILD.gn
@@ -6,7 +6,7 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-import("../../build/webrtc.gni")
+import("../../webrtc.gni")
 
 if (is_android) {
   import("//build/config/android/config.gni")
diff --git a/webrtc/modules/audio_mixer/BUILD.gn b/webrtc/modules/audio_mixer/BUILD.gn
index 25c782b..083e02b 100644
--- a/webrtc/modules/audio_mixer/BUILD.gn
+++ b/webrtc/modules/audio_mixer/BUILD.gn
@@ -6,7 +6,7 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-import("../../build/webrtc.gni")
+import("../../webrtc.gni")
 
 group("audio_mixer") {
   public_deps = [
diff --git a/webrtc/modules/audio_processing/BUILD.gn b/webrtc/modules/audio_processing/BUILD.gn
index 4f3ea13..87501f4 100644
--- a/webrtc/modules/audio_processing/BUILD.gn
+++ b/webrtc/modules/audio_processing/BUILD.gn
@@ -8,7 +8,7 @@
 
 import("//build/config/arm.gni")
 import("//third_party/protobuf/proto_library.gni")
-import("../../build/webrtc.gni")
+import("../../webrtc.gni")
 
 declare_args() {
   # Disables the usual mode where we trust the reported system delay
diff --git a/webrtc/modules/bitrate_controller/BUILD.gn b/webrtc/modules/bitrate_controller/BUILD.gn
index b2747db..58398f3 100644
--- a/webrtc/modules/bitrate_controller/BUILD.gn
+++ b/webrtc/modules/bitrate_controller/BUILD.gn
@@ -6,7 +6,7 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-import("../../build/webrtc.gni")
+import("../../webrtc.gni")
 
 rtc_static_library("bitrate_controller") {
   # TODO(mbonadei): Remove (bugs.webrtc.org/6828)
diff --git a/webrtc/modules/congestion_controller/BUILD.gn b/webrtc/modules/congestion_controller/BUILD.gn
index 03e0d5c..a20339c 100644
--- a/webrtc/modules/congestion_controller/BUILD.gn
+++ b/webrtc/modules/congestion_controller/BUILD.gn
@@ -6,7 +6,7 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-import("../../build/webrtc.gni")
+import("../../webrtc.gni")
 
 rtc_static_library("congestion_controller") {
   sources = [
diff --git a/webrtc/modules/desktop_capture/BUILD.gn b/webrtc/modules/desktop_capture/BUILD.gn
index 67ec8ce..9c9a466 100644
--- a/webrtc/modules/desktop_capture/BUILD.gn
+++ b/webrtc/modules/desktop_capture/BUILD.gn
@@ -7,7 +7,7 @@
 # be found in the AUTHORS file in the root of the source tree.
 
 import("//build/config/ui.gni")
-import("../../build/webrtc.gni")
+import("../../webrtc.gni")
 
 use_desktop_capture_differ_sse2 = current_cpu == "x86" || current_cpu == "x64"
 
diff --git a/webrtc/modules/media_file/BUILD.gn b/webrtc/modules/media_file/BUILD.gn
index 8003cd8..32825af 100644
--- a/webrtc/modules/media_file/BUILD.gn
+++ b/webrtc/modules/media_file/BUILD.gn
@@ -6,7 +6,7 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-import("../../build/webrtc.gni")
+import("../../webrtc.gni")
 
 config("media_file_config") {
   visibility = [ ":*" ]  # Only targets in this file can depend on this.
diff --git a/webrtc/modules/pacing/BUILD.gn b/webrtc/modules/pacing/BUILD.gn
index 0a357c0..f94def7 100644
--- a/webrtc/modules/pacing/BUILD.gn
+++ b/webrtc/modules/pacing/BUILD.gn
@@ -6,7 +6,7 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-import("../../build/webrtc.gni")
+import("../../webrtc.gni")
 
 rtc_static_library("pacing") {
   sources = [
diff --git a/webrtc/modules/remote_bitrate_estimator/BUILD.gn b/webrtc/modules/remote_bitrate_estimator/BUILD.gn
index 81028f6..13e2382 100644
--- a/webrtc/modules/remote_bitrate_estimator/BUILD.gn
+++ b/webrtc/modules/remote_bitrate_estimator/BUILD.gn
@@ -6,7 +6,7 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-import("../../build/webrtc.gni")
+import("../../webrtc.gni")
 
 rtc_static_library("remote_bitrate_estimator") {
   # TODO(mbonadei): Remove (bugs.webrtc.org/6828)
diff --git a/webrtc/modules/rtp_rtcp/BUILD.gn b/webrtc/modules/rtp_rtcp/BUILD.gn
index 9b23621..4fa4d49 100644
--- a/webrtc/modules/rtp_rtcp/BUILD.gn
+++ b/webrtc/modules/rtp_rtcp/BUILD.gn
@@ -6,7 +6,7 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-import("../../build/webrtc.gni")
+import("../../webrtc.gni")
 
 rtc_static_library("rtp_rtcp") {
   sources = [
diff --git a/webrtc/modules/utility/BUILD.gn b/webrtc/modules/utility/BUILD.gn
index 5b6a232..ec11b9f 100644
--- a/webrtc/modules/utility/BUILD.gn
+++ b/webrtc/modules/utility/BUILD.gn
@@ -6,7 +6,7 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-import("../../build/webrtc.gni")
+import("../../webrtc.gni")
 
 rtc_static_library("utility") {
   sources = [
diff --git a/webrtc/modules/video_capture/BUILD.gn b/webrtc/modules/video_capture/BUILD.gn
index 6887552..90b824a 100644
--- a/webrtc/modules/video_capture/BUILD.gn
+++ b/webrtc/modules/video_capture/BUILD.gn
@@ -6,7 +6,7 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-import("../../build/webrtc.gni")
+import("../../webrtc.gni")
 
 # Note this target is missing an implementation for the video capture.
 # Targets must link with either 'video_capture' or
diff --git a/webrtc/modules/video_coding/BUILD.gn b/webrtc/modules/video_coding/BUILD.gn
index f84936a..5750d10 100644
--- a/webrtc/modules/video_coding/BUILD.gn
+++ b/webrtc/modules/video_coding/BUILD.gn
@@ -6,7 +6,7 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-import("../../build/webrtc.gni")
+import("../../webrtc.gni")
 
 rtc_static_library("video_coding") {
   sources = [
diff --git a/webrtc/modules/video_processing/BUILD.gn b/webrtc/modules/video_processing/BUILD.gn
index 5da0ae8..6da43b4 100644
--- a/webrtc/modules/video_processing/BUILD.gn
+++ b/webrtc/modules/video_processing/BUILD.gn
@@ -7,7 +7,7 @@
 # be found in the AUTHORS file in the root of the source tree.
 
 import("//build/config/arm.gni")
-import("../../build/webrtc.gni")
+import("../../webrtc.gni")
 
 build_video_processing_sse2 = current_cpu == "x86" || current_cpu == "x64"
 
diff --git a/webrtc/p2p/BUILD.gn b/webrtc/p2p/BUILD.gn
index e99440c..04e9b17 100644
--- a/webrtc/p2p/BUILD.gn
+++ b/webrtc/p2p/BUILD.gn
@@ -6,7 +6,7 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-import("../build/webrtc.gni")
+import("../webrtc.gni")
 
 group("p2p") {
   public_deps = [
diff --git a/webrtc/pc/BUILD.gn b/webrtc/pc/BUILD.gn
index d447db7..5aa3ae4 100644
--- a/webrtc/pc/BUILD.gn
+++ b/webrtc/pc/BUILD.gn
@@ -6,7 +6,7 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-import("../build/webrtc.gni")
+import("../webrtc.gni")
 if (is_android) {
   import("//build/config/android/config.gni")
   import("//build/config/android/rules.gni")
diff --git a/webrtc/sdk/BUILD.gn b/webrtc/sdk/BUILD.gn
index e610242..9f3ccc6 100644
--- a/webrtc/sdk/BUILD.gn
+++ b/webrtc/sdk/BUILD.gn
@@ -6,7 +6,7 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-import("../build/webrtc.gni")
+import("../webrtc.gni")
 if (is_ios) {
   import("//build/config/ios/rules.gni")
 }
diff --git a/webrtc/sdk/android/BUILD.gn b/webrtc/sdk/android/BUILD.gn
index 1df43e2..710d962 100644
--- a/webrtc/sdk/android/BUILD.gn
+++ b/webrtc/sdk/android/BUILD.gn
@@ -6,7 +6,7 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-import("//webrtc/build/webrtc.gni")
+import("//webrtc/webrtc.gni")
 import("//build/config/android/config.gni")
 import("//build/config/android/rules.gni")
 
diff --git a/webrtc/stats/BUILD.gn b/webrtc/stats/BUILD.gn
index 8fa8087..85ba21d 100644
--- a/webrtc/stats/BUILD.gn
+++ b/webrtc/stats/BUILD.gn
@@ -6,7 +6,7 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-import("../build/webrtc.gni")
+import("../webrtc.gni")
 
 group("stats") {
   public_deps = [
diff --git a/webrtc/system_wrappers/BUILD.gn b/webrtc/system_wrappers/BUILD.gn
index 745867b..96177fd 100644
--- a/webrtc/system_wrappers/BUILD.gn
+++ b/webrtc/system_wrappers/BUILD.gn
@@ -10,7 +10,7 @@
   import("//build/config/android/config.gni")
   import("//build/config/android/rules.gni")
 }
-import("../build/webrtc.gni")
+import("../webrtc.gni")
 
 rtc_static_library("system_wrappers") {
   sources = [
diff --git a/webrtc/test/BUILD.gn b/webrtc/test/BUILD.gn
index 5ad85fc..9893814 100644
--- a/webrtc/test/BUILD.gn
+++ b/webrtc/test/BUILD.gn
@@ -6,7 +6,7 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-import("../build/webrtc.gni")
+import("../webrtc.gni")
 import("//build/config/ui.gni")
 if (is_android) {
   import("//build/config/android/rules.gni")
diff --git a/webrtc/test/fuzzers/BUILD.gn b/webrtc/test/fuzzers/BUILD.gn
index ea2352a..031ed8b 100644
--- a/webrtc/test/fuzzers/BUILD.gn
+++ b/webrtc/test/fuzzers/BUILD.gn
@@ -6,7 +6,7 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-import("../../build/webrtc.gni")
+import("../../webrtc.gni")
 import("//build/config/features.gni")
 import("//testing/libfuzzer/fuzzer_test.gni")
 
diff --git a/webrtc/tools/BUILD.gn b/webrtc/tools/BUILD.gn
index 8773cfc..46a0ede 100644
--- a/webrtc/tools/BUILD.gn
+++ b/webrtc/tools/BUILD.gn
@@ -7,7 +7,7 @@
 # be found in the AUTHORS file in the root of the source tree.
 
 import("//third_party/protobuf/proto_library.gni")
-import("../build/webrtc.gni")
+import("../webrtc.gni")
 
 group("tools") {
   # This target shall build all targets in tools/.
diff --git a/webrtc/video/BUILD.gn b/webrtc/video/BUILD.gn
index ed69526..48dff5b 100644
--- a/webrtc/video/BUILD.gn
+++ b/webrtc/video/BUILD.gn
@@ -6,7 +6,7 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-import("../build/webrtc.gni")
+import("../webrtc.gni")
 
 rtc_static_library("video") {
   sources = [
diff --git a/webrtc/voice_engine/BUILD.gn b/webrtc/voice_engine/BUILD.gn
index c29e646..cb97693 100644
--- a/webrtc/voice_engine/BUILD.gn
+++ b/webrtc/voice_engine/BUILD.gn
@@ -6,7 +6,7 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-import("../build/webrtc.gni")
+import("../webrtc.gni")
 
 rtc_static_library("audio_coder") {
   sources = [
diff --git a/webrtc/webrtc.gni b/webrtc/webrtc.gni
new file mode 100644
index 0000000..53dcae2
--- /dev/null
+++ b/webrtc/webrtc.gni
@@ -0,0 +1,325 @@
+# Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
+#
+# Use of this source code is governed by a BSD-style license
+# that can be found in the LICENSE file in the root of the source
+# tree. An additional intellectual property rights grant can be found
+# in the file PATENTS.  All contributing project authors may
+# be found in the AUTHORS file in the root of the source tree.
+
+import("//build/config/arm.gni")
+import("//build/config/features.gni")
+import("//build/config/mips.gni")
+import("//build/config/sanitizers/sanitizers.gni")
+import("//build_overrides/build.gni")
+import("//testing/test.gni")
+
+declare_args() {
+  # Disable this to avoid building the Opus audio codec.
+  rtc_include_opus = true
+
+  # Enable this to let the Opus audio codec change complexity on the fly.
+  rtc_opus_variable_complexity = false
+
+  # Disable to use absolute header paths for some libraries.
+  rtc_relative_path = true
+
+  # Used to specify an external Jsoncpp include path when not compiling the
+  # library that comes with WebRTC (i.e. rtc_build_json == 0).
+  rtc_jsoncpp_root = "//third_party/jsoncpp/source/include"
+
+  # Used to specify an external OpenSSL include path when not compiling the
+  # library that comes with WebRTC (i.e. rtc_build_ssl == 0).
+  rtc_ssl_root = ""
+
+  # Selects fixed-point code where possible.
+  rtc_prefer_fixed_point = false
+
+  # Enables the use of protocol buffers for debug recordings.
+  rtc_enable_protobuf = true
+
+  # Disable the code for the intelligibility enhancer by default.
+  rtc_enable_intelligibility_enhancer = false
+
+  # Enable when an external authentication mechanism is used for performing
+  # packet authentication for RTP packets instead of libsrtp.
+  rtc_enable_external_auth = build_with_chromium
+
+  # Selects whether debug dumps for the audio processing module
+  # should be generated.
+  apm_debug_dump = false
+
+  # Set this to true to enable BWE test logging.
+  rtc_enable_bwe_test_logging = false
+
+  # Set this to disable building with support for SCTP data channels.
+  rtc_enable_sctp = true
+
+  # Disable these to not build components which can be externally provided.
+  rtc_build_expat = true
+  rtc_build_json = true
+  rtc_build_libjpeg = true
+  rtc_build_libsrtp = true
+  rtc_build_libvpx = true
+  rtc_libvpx_build_vp9 = true
+  rtc_build_libyuv = true
+  rtc_build_openmax_dl = true
+  rtc_build_opus = true
+  rtc_build_ssl = true
+  rtc_build_usrsctp = true
+
+  # Enable to use the Mozilla internal settings.
+  build_with_mozilla = false
+
+  rtc_enable_android_opensl = false
+
+  # Link-Time Optimizations.
+  # Executes code generation at link-time instead of compile-time.
+  # https://gcc.gnu.org/wiki/LinkTimeOptimization
+  rtc_use_lto = false
+
+  # Set to "func", "block", "edge" for coverage generation.
+  # At unit test runtime set UBSAN_OPTIONS="coverage=1".
+  # It is recommend to set include_examples=0.
+  # Use llvm's sancov -html-report for human readable reports.
+  # See http://clang.llvm.org/docs/SanitizerCoverage.html .
+  rtc_sanitize_coverage = ""
+
+  # Enable libevent task queues on platforms that support it.
+  if (is_win || is_mac || is_ios || is_nacl) {
+    rtc_enable_libevent = false
+    rtc_build_libevent = false
+  } else {
+    rtc_enable_libevent = true
+    rtc_build_libevent = true
+  }
+
+  if (current_cpu == "arm" || current_cpu == "arm64") {
+    rtc_prefer_fixed_point = true
+  }
+
+  if (!is_ios && (current_cpu != "arm" || arm_version >= 7) &&
+      current_cpu != "mips64el") {
+    rtc_use_openmax_dl = true
+  } else {
+    rtc_use_openmax_dl = false
+  }
+
+  # Determines whether NEON code will be built.
+  rtc_build_with_neon =
+      (current_cpu == "arm" && arm_use_neon) || current_cpu == "arm64"
+
+  # Enable this to build OpenH264 encoder/FFmpeg decoder. This is supported on
+  # all platforms except Android and iOS. Because FFmpeg can be built
+  # with/without H.264 support, |ffmpeg_branding| has to separately be set to a
+  # value that includes H.264, for example "Chrome". If FFmpeg is built without
+  # H.264, compilation succeeds but |H264DecoderImpl| fails to initialize. See
+  # also: |rtc_initialize_ffmpeg|.
+  # CHECK THE OPENH264, FFMPEG AND H.264 LICENSES/PATENTS BEFORE BUILDING.
+  # http://www.openh264.org, https://www.ffmpeg.org/
+  rtc_use_h264 = proprietary_codecs && !is_android && !is_ios
+
+  # Determines whether QUIC code will be built.
+  rtc_use_quic = false
+
+  # By default, use normal platform audio support or dummy audio, but don't
+  # use file-based audio playout and record.
+  rtc_use_dummy_audio_file_devices = false
+
+  # When set to true, test targets will declare the files needed to run memcheck
+  # as data dependencies. This is to enable memcheck execution on swarming bots.
+  rtc_use_memcheck = false
+
+  # FFmpeg must be initialized for |H264DecoderImpl| to work. This can be done
+  # by WebRTC during |H264DecoderImpl::InitDecode| or externally. FFmpeg must
+  # only be initialized once. Projects that initialize FFmpeg externally, such
+  # as Chromium, must turn this flag off so that WebRTC does not also
+  # initialize.
+  rtc_initialize_ffmpeg = !build_with_chromium
+
+  # Build sources requiring GTK. NOTICE: This is not present in Chrome OS
+  # build environments, even if available for Chromium builds.
+  rtc_use_gtk = !build_with_chromium
+}
+
+# A second declare_args block, so that declarations within it can
+# depend on the possibly overridden variables in the first
+# declare_args block.
+declare_args() {
+  # Include the iLBC audio codec?
+  rtc_include_ilbc = !(build_with_chromium || build_with_mozilla)
+
+  rtc_restrict_logging = build_with_chromium
+
+  # Excluded in Chromium since its prerequisites don't require Pulse Audio.
+  rtc_include_pulse_audio = !build_with_chromium
+
+  # Chromium uses its own IO handling, so the internal ADM is only built for
+  # standalone WebRTC.
+  rtc_include_internal_audio_device = !build_with_chromium
+
+  # Include tests in standalone checkout.
+  rtc_include_tests = !build_with_chromium
+}
+
+# Make it possible to provide custom locations for some libraries (move these
+# up into declare_args should we need to actually use them for the GN build).
+rtc_libvpx_dir = "//third_party/libvpx"
+rtc_libyuv_dir = "//third_party/libyuv"
+rtc_opus_dir = "//third_party/opus"
+
+# Desktop capturer is supported only on Windows, OSX and Linux.
+rtc_desktop_capture_supported = is_win || is_mac || is_linux
+
+###############################################################################
+# Templates
+#
+
+# Points to //webrtc/ in webrtc stand-alone or to //third_party/webrtc/ in
+# chromium.
+# We need absolute paths for all configs in templates as they are shared in
+# different subdirectories.
+webrtc_root = get_path_info(".", "abspath")
+
+# Global configuration that should be applied to all WebRTC targets.
+# You normally shouldn't need to include this in your target as it's
+# automatically included when using the rtc_* templates.
+# It sets defines, include paths and compilation warnings accordingly,
+# both for WebRTC stand-alone builds and for the scenario when WebRTC
+# native code is built as part of Chromium.
+rtc_common_configs = [ webrtc_root + ":common_config" ]
+
+# Global public configuration that should be applied to all WebRTC targets. You
+# normally shouldn't need to include this in your target as it's automatically
+# included when using the rtc_* templates. It set the defines, include paths and
+# compilation warnings that should be propagated to dependents of the targets
+# depending on the target having this config.
+rtc_common_inherited_config = webrtc_root + ":common_inherited_config"
+
+# Common configs to remove or add in all rtc targets.
+rtc_remove_configs = []
+rtc_add_configs = rtc_common_configs
+
+set_defaults("rtc_test") {
+  configs = rtc_add_configs
+  suppressed_configs = []
+}
+
+set_defaults("rtc_source_set") {
+  configs = rtc_add_configs
+  suppressed_configs = []
+}
+
+set_defaults("rtc_executable") {
+  configs = rtc_add_configs
+  suppressed_configs = []
+}
+
+set_defaults("rtc_static_library") {
+  configs = rtc_add_configs
+  suppressed_configs = []
+}
+
+set_defaults("rtc_shared_library") {
+  configs = rtc_add_configs
+  suppressed_configs = []
+}
+
+template("rtc_test") {
+  test(target_name) {
+    forward_variables_from(invoker,
+                           "*",
+                           [
+                             "configs",
+                             "public_configs",
+                             "suppressed_configs",
+                           ])
+    configs += invoker.configs
+    configs -= rtc_remove_configs
+    configs -= invoker.suppressed_configs
+    public_configs = [ rtc_common_inherited_config ]
+    if (defined(invoker.public_configs)) {
+      public_configs += invoker.public_configs
+    }
+  }
+}
+
+template("rtc_source_set") {
+  source_set(target_name) {
+    forward_variables_from(invoker,
+                           "*",
+                           [
+                             "configs",
+                             "public_configs",
+                             "suppressed_configs",
+                           ])
+    configs += invoker.configs
+    configs -= rtc_remove_configs
+    configs -= invoker.suppressed_configs
+    public_configs = [ rtc_common_inherited_config ]
+    if (defined(invoker.public_configs)) {
+      public_configs += invoker.public_configs
+    }
+  }
+}
+
+template("rtc_executable") {
+  executable(target_name) {
+    forward_variables_from(invoker,
+                           "*",
+                           [
+                             "deps",
+                             "configs",
+                             "public_configs",
+                             "suppressed_configs",
+                           ])
+    configs += invoker.configs
+    configs -= rtc_remove_configs
+    configs -= invoker.suppressed_configs
+    deps = [
+      "//build/config/sanitizers:deps",
+    ]
+    deps += invoker.deps
+    public_configs = [ rtc_common_inherited_config ]
+    if (defined(invoker.public_configs)) {
+      public_configs += invoker.public_configs
+    }
+  }
+}
+
+template("rtc_static_library") {
+  static_library(target_name) {
+    forward_variables_from(invoker,
+                           "*",
+                           [
+                             "configs",
+                             "public_configs",
+                             "suppressed_configs",
+                           ])
+    configs += invoker.configs
+    configs -= rtc_remove_configs
+    configs -= invoker.suppressed_configs
+    public_configs = [ rtc_common_inherited_config ]
+    if (defined(invoker.public_configs)) {
+      public_configs += invoker.public_configs
+    }
+  }
+}
+
+template("rtc_shared_library") {
+  shared_library(target_name) {
+    forward_variables_from(invoker,
+                           "*",
+                           [
+                             "configs",
+                             "public_configs",
+                             "suppressed_configs",
+                           ])
+    configs += invoker.configs
+    configs -= rtc_remove_configs
+    configs -= invoker.suppressed_configs
+    public_configs = [ rtc_common_inherited_config ]
+    if (defined(invoker.public_configs)) {
+      public_configs += invoker.public_configs
+    }
+  }
+}