Harmonize paths to dependent targets.

This CL consistently use:
 * relative paths for WebRTC dependent targets (test_support)
 * absolute paths for shared dependent targets (abseil)
This is a necessary (but insufficient) step to build WebRTC tests
from Chromium tree (rtc_include_tests=true), since test/ doesn't
sit anymore in the top level directory.

We also make sure that target declarations and uses are
consistent in regard to build_with_chromium flag.

Bug: webrtc:9943
Bug: webrtc:9855
Change-Id: I21dea98894df2fd4bfe2fd7ee7b71ba971e0ab5b
Reviewed-on: https://webrtc-review.googlesource.com/c/108720
Reviewed-by: Patrik Höglund <phoglund@webrtc.org>
Commit-Queue: Yves Gerey <yvesg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#25445}
diff --git a/rtc_tools/BUILD.gn b/rtc_tools/BUILD.gn
index 3d9804c..6f60ab1 100644
--- a/rtc_tools/BUILD.gn
+++ b/rtc_tools/BUILD.gn
@@ -36,8 +36,10 @@
       ":tools_unittests",
     ]
     if (rtc_enable_protobuf) {
+      if (!build_with_chromium) {
+        deps += [ ":event_log_visualizer" ]
+      }
       deps += [
-        ":event_log_visualizer",
         ":rtp_analyzer",
         ":unpack_aecdump",
         "network_tester",
@@ -275,7 +277,7 @@
 }
 
 if (rtc_include_tests) {
-  if (rtc_enable_protobuf) {
+  if (rtc_enable_protobuf && !build_with_chromium) {
     rtc_executable("event_log_visualizer") {
       testonly = true
       sources = [
@@ -357,8 +359,6 @@
 
     deps = [
       ":command_line_parser",
-      ":frame_editing_lib",
-      ":reference_less_video_analysis_lib",
       ":video_file_reader",
       ":video_file_writer",
       ":video_quality_analysis",
@@ -367,12 +367,19 @@
       "../rtc_base:checks",
       "../test:fileutils",
       "../test:test_main",
-      "//test:test_support",
+      "../test:test_support",
       "//testing/gtest",
       "//third_party/abseil-cpp/absl/memory",
       "//third_party/libyuv",
     ]
 
+    if (!build_with_chromium) {
+      deps += [
+        ":frame_editing_lib",
+        ":reference_less_video_analysis_lib",
+      ]
+    }
+
     if (rtc_enable_protobuf) {
       deps += [ "network_tester:network_tester_unittests" ]
     }