Revert of Enable H.264 video WebRTC behind run-time flag and add WebRtcBrowserTest for H.264

content/public/common/BUILD.gn

Index: content/public/common/BUILD.gn
diff --git a/content/public/common/BUILD.gn b/content/public/common/BUILD.gn
index fc20435e8437ec1b472aefc266577ab0298a066f..b8a7cd1f699f2847747ef23ae29c509a19fe9a11 100644
--- a/content/public/common/BUILD.gn
+++ b/content/public/common/BUILD.gn
@@ -2,12 +2,10 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-import("//build/buildflag_header.gni")
 import("//build/config/chromecast_build.gni")
 import("//build/config/features.gni")
 import("//content/common/common.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
-import("//third_party/webrtc/build/webrtc.gni")
 
 # See //content/BUILD.gn for how this works.
 group("common") {
@@ -121,19 +119,3 @@
     "service_worker_event_status.mojom",
   ]
 }
-
-buildflag_header("common_features") {
-  header = "common_features.h"
-
-  flags = [ "RTC_USE_H264=$rtc_use_h264" ]
-}
-
-source_set("feature_h264_with_openh264_ffmpeg") {
-  deps = [
-    ":common_features",
-  ]
-  sources = [
-    "feature_h264_with_openh264_ffmpeg.cc",
-    "feature_h264_with_openh264_ffmpeg.h",
-  ]
-}