Android: enable WebRTC HW H264 with a flag by default

content/browser/gpu/gpu_data_manager_impl_private.cc

Index: content/browser/gpu/gpu_data_manager_impl_private.cc
diff --git a/content/browser/gpu/gpu_data_manager_impl_private.cc b/content/browser/gpu/gpu_data_manager_impl_private.cc
index 78e7c4b36807678cf0cfe0b35b646731c8b40737..c736f64486887a1b0060e740ec43e1d3eed2176c 100644
--- a/content/browser/gpu/gpu_data_manager_impl_private.cc
+++ b/content/browser/gpu/gpu_data_manager_impl_private.cc
@@ -28,6 +28,7 @@
 #include "content/public/browser/gpu_data_manager_observer.h"
 #include "content/public/common/content_client.h"
 #include "content/public/common/content_constants.h"
+#include "content/public/common/content_features.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/web_preferences.h"
 #include "gpu/command_buffer/service/gpu_preferences.h"
@@ -775,7 +776,8 @@ void GpuDataManagerImplPrivate::AppendGpuCommandLine(
 
 #if BUILDFLAG(ENABLE_WEBRTC)
   if (IsFeatureBlacklisted(gpu::GPU_FEATURE_TYPE_ACCELERATED_VIDEO_ENCODE) &&
-      !command_line->HasSwitch(switches::kDisableWebRtcHWEncoding)) {
+      !command_line->HasSwitch(switches::kDisableWebRtcHWEncoding) &&
+      !base::FeatureList::IsEnabled(features::kWebRtcHWH264EncodingAndroid)) {
     if (gpu_preferences) {
       gpu_preferences->disable_web_rtc_hw_encoding = true;
     } else {