Android: enable/disable WebRTC HW H264 with a flag.

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 96beb775df9b3160d7e407bce87e51bc90d2cc36..a6b6478371be3034b6bf3f6092a60fdd7b09e196 100644
--- a/content/browser/gpu/gpu_data_manager_impl_private.cc
+++ b/content/browser/gpu/gpu_data_manager_impl_private.cc
@@ -683,6 +683,13 @@ void GpuDataManagerImplPrivate::AppendRendererCommandLine(
     command_line->AppendSwitch(switches::kDisableWebRtcHWEncoding);
 #endif
 
+// Disabe HW encoding by default on Android.

[watk, 2016/10/01 01:06:53]

Disable

[braveyao, 2016/10/03 23:50:14]

Done.

+#if defined(ENABLE_WEBRTC) && defined(OS_ANDROID)
+  if (!command_line->HasSwitch(switches::kDisableWebRtcHWEncoding)) {
+    command_line->AppendSwitch(switches::kDisableWebRtcHWEncoding);
+  }
+#endif
+
 #if defined(USE_AURA)
   if (!CanUseGpuBrowserCompositor())
     command_line->AppendSwitch(switches::kDisableGpuCompositing);