H264 HW encode using VideoToolbox

content/common/gpu/media/gpu_video_encode_accelerator.cc

Index: content/common/gpu/media/gpu_video_encode_accelerator.cc
diff --git a/content/common/gpu/media/gpu_video_encode_accelerator.cc b/content/common/gpu/media/gpu_video_encode_accelerator.cc
index bf4668356254e8084713d0648b78ec98766178c3..3552dc3b7371d2a8587fa8707fcb12227a9d3604 100644
--- a/content/common/gpu/media/gpu_video_encode_accelerator.cc
+++ b/content/common/gpu/media/gpu_video_encode_accelerator.cc
@@ -30,6 +30,8 @@
 #endif
 #elif defined(OS_ANDROID) && defined(ENABLE_WEBRTC)
 #include "content/common/gpu/media/android_video_encode_accelerator.h"
+#elif defined(OS_MACOSX)
+#include "content/common/gpu/media/vt_video_encode_accelerator_mac.h"
 #endif
 
 namespace content {
@@ -201,6 +203,7 @@ GpuVideoEncodeAccelerator::CreateVEAFps() {
   create_vea_fps.push_back(&GpuVideoEncodeAccelerator::CreateV4L2VEA);
   create_vea_fps.push_back(&GpuVideoEncodeAccelerator::CreateVaapiVEA);
   create_vea_fps.push_back(&GpuVideoEncodeAccelerator::CreateAndroidVEA);
+  create_vea_fps.push_back(&GpuVideoEncodeAccelerator::CreateVTVEA);
   return create_vea_fps;
 }
 
@@ -238,6 +241,18 @@ GpuVideoEncodeAccelerator::CreateAndroidVEA() {
   return encoder;
 }
 
+// static
+scoped_ptr<media::VideoEncodeAccelerator>
+GpuVideoEncodeAccelerator::CreateVTVEA() {
+  scoped_ptr<media::VideoEncodeAccelerator> encoder;
+#if defined(OS_MACOSX)
+  const base::CommandLine* cmd_line = base::CommandLine::ForCurrentProcess();
+  if (!cmd_line->HasSwitch(switches::kDisableVTAcceleratedVideoEncode))
+    encoder.reset(new VTVideoEncodeAccelerator());
+#endif  // defined(OS_MACOSX)
+  return encoder;
+}
+
 void GpuVideoEncodeAccelerator::OnEncode(
     const AcceleratedVideoEncoderMsg_Encode_Params& params) {
   DVLOG(3) << "GpuVideoEncodeAccelerator::OnEncode: frame_id = "