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

media/base/android/media_codec_util.cc

Index: media/base/android/media_codec_util.cc
diff --git a/media/base/android/media_codec_util.cc b/media/base/android/media_codec_util.cc
index e507936f4f8e7c9bfce91189cb72e3b060c3788c..9e789ede6f145a7def72aa036e565ffcbb085f38 100644
--- a/media/base/android/media_codec_util.cc
+++ b/media/base/android/media_codec_util.cc
@@ -87,6 +87,14 @@ static bool IsDecoderSupportedByDevice(const std::string& android_mime_type) {
   return Java_MediaCodecUtil_isDecoderSupportedForDevice(env, j_mime);
 }
 
+static bool IsEncoderSupportedByDevice(const std::string& android_mime_type) {
+  DCHECK(MediaCodecUtil::IsMediaCodecAvailable());
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jstring> j_mime =
+      ConvertUTF8ToJavaString(env, android_mime_type);
+  return Java_MediaCodecUtil_isEncoderSupportedByDevice(env, j_mime);
+}
+
 // static
 bool MediaCodecUtil::IsMediaCodecAvailable() {
   // MediaCodec is only available on JB and greater.
@@ -211,6 +219,11 @@ bool MediaCodecUtil::IsVp9DecoderAvailable() {
 }
 
 // static
+bool MediaCodecUtil::IsH264EncoderAvailable() {
+  return IsMediaCodecAvailable() && IsEncoderSupportedByDevice(kAvcMimeType);
+}
+
+// static
 bool MediaCodecUtil::IsSurfaceViewOutputSupported() {
   // Disable SurfaceView output for the Samsung Galaxy S3; it does not work
   // well enough for even 360p24 H264 playback.  http://crbug.com/602870.