(4) Rename files to snake_case: update BUILD.gn, include paths, header guards, and DEPS entries

Mechanically generated by running this command:

tools_webrtc/do-renames.sh update all-renames.txt && git cl format

Then manually updating:

tools_webrtc/sanitizers/tsan_suppressions_webrtc.cc

Bug: webrtc:10159
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Change-Id: I54824cd91dada8fc3ee3d098f971bc319d477833
Reviewed-on: https://webrtc-review.googlesource.com/c/115653
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26226}
diff --git a/stats/BUILD.gn b/stats/BUILD.gn
index c16d8d1..85fe091 100644
--- a/stats/BUILD.gn
+++ b/stats/BUILD.gn
@@ -18,9 +18,9 @@
   visibility = [ "*" ]
   cflags = []
   sources = [
-    "rtcstats.cc",
+    "rtc_stats.cc",
+    "rtc_stats_report.cc",
     "rtcstats_objects.cc",
-    "rtcstatsreport.cc",
   ]
 
   deps = [
@@ -34,8 +34,8 @@
   visibility = [ "*" ]
   cflags = []
   sources = [
-    "test/rtcteststats.cc",
-    "test/rtcteststats.h",
+    "test/rtc_test_stats.cc",
+    "test/rtc_test_stats.h",
   ]
 
   deps = [
@@ -50,8 +50,8 @@
   rtc_test("rtc_stats_unittests") {
     testonly = true
     sources = [
-      "rtcstats_unittest.cc",
-      "rtcstatsreport_unittest.cc",
+      "rtc_stats_report_unittest.cc",
+      "rtc_stats_unittest.cc",
     ]
 
     deps = [
diff --git a/stats/rtc_stats.cc b/stats/rtc_stats.cc
index d5ea319..4332fe6 100644
--- a/stats/rtc_stats.cc
+++ b/stats/rtc_stats.cc
@@ -8,12 +8,12 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "api/stats/rtcstats.h"
+#include "api/stats/rtc_stats.h"
 
 #include <cstdio>
 
 #include "rtc_base/arraysize.h"
-#include "rtc_base/stringencode.h"
+#include "rtc_base/string_encode.h"
 #include "rtc_base/strings/string_builder.h"
 
 namespace webrtc {
diff --git a/stats/rtc_stats_report.cc b/stats/rtc_stats_report.cc
index 82db8f6..bdafd56 100644
--- a/stats/rtc_stats_report.cc
+++ b/stats/rtc_stats_report.cc
@@ -8,7 +8,7 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "api/stats/rtcstatsreport.h"
+#include "api/stats/rtc_stats_report.h"
 
 #include <type_traits>
 #include <utility>
diff --git a/stats/rtc_stats_report_unittest.cc b/stats/rtc_stats_report_unittest.cc
index 80a6f2d..a7d4a42 100644
--- a/stats/rtc_stats_report_unittest.cc
+++ b/stats/rtc_stats_report_unittest.cc
@@ -8,9 +8,9 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "api/stats/rtcstatsreport.h"
+#include "api/stats/rtc_stats_report.h"
 
-#include "api/stats/rtcstats.h"
+#include "api/stats/rtc_stats.h"
 #include "rtc_base/checks.h"
 #include "test/gtest.h"
 
diff --git a/stats/rtc_stats_unittest.cc b/stats/rtc_stats_unittest.cc
index 95a4015..b079ddd 100644
--- a/stats/rtc_stats_unittest.cc
+++ b/stats/rtc_stats_unittest.cc
@@ -8,7 +8,7 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "api/stats/rtcstats.h"
+#include "api/stats/rtc_stats.h"
 
 #include <cmath>
 #include <cstdint>
@@ -17,7 +17,7 @@
 
 #include "rtc_base/checks.h"
 #include "rtc_base/strings/json.h"
-#include "stats/test/rtcteststats.h"
+#include "stats/test/rtc_test_stats.h"
 #include "test/gtest.h"
 
 namespace webrtc {
diff --git a/stats/test/rtc_test_stats.cc b/stats/test/rtc_test_stats.cc
index 538f303..d5576e6 100644
--- a/stats/test/rtc_test_stats.cc
+++ b/stats/test/rtc_test_stats.cc
@@ -8,7 +8,7 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "stats/test/rtcteststats.h"
+#include "stats/test/rtc_test_stats.h"
 
 #include "rtc_base/checks.h"
 
diff --git a/stats/test/rtc_test_stats.h b/stats/test/rtc_test_stats.h
index 766d045..1db32c2 100644
--- a/stats/test/rtc_test_stats.h
+++ b/stats/test/rtc_test_stats.h
@@ -8,14 +8,14 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#ifndef STATS_TEST_RTCTESTSTATS_H_
-#define STATS_TEST_RTCTESTSTATS_H_
+#ifndef STATS_TEST_RTC_TEST_STATS_H_
+#define STATS_TEST_RTC_TEST_STATS_H_
 
 #include <cstdint>
 #include <string>
 #include <vector>
 
-#include "api/stats/rtcstats.h"
+#include "api/stats/rtc_stats.h"
 #include "rtc_base/system/rtc_export.h"
 
 namespace webrtc {
@@ -46,4 +46,4 @@
 
 }  // namespace webrtc
 
-#endif  // STATS_TEST_RTCTESTSTATS_H_
+#endif  // STATS_TEST_RTC_TEST_STATS_H_