Add trace around color conversion (VideoCaptureController::OnIncomingCapturedFrame).

BUG=282346

Review URL: https://chromiumcodereview.appspot.com/23455021

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@220703 0039d316-1c4b-4281-b951-d872f2087c98

content/browser/renderer_host/media/video_capture_controller.cc

@@ -7,6 +7,7 @@
 #include <set>
 
 #include "base/bind.h"
+#include "base/debug/trace_event.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/stl_util.h"
 #include "content/browser/renderer_host/media/media_stream_manager.h"
@@ -268,6 +269,8 @@ void VideoCaptureController::OnIncomingCapturedFrame(
          frame_info_.color == media::VideoCaptureCapability::kYV12 ||
          (rotation == 0 && !flip_vert && !flip_horiz));
 
+  TRACE_EVENT0("video", "VideoCaptureController::OnIncomingCapturedFrame");
+
   scoped_refptr<media::VideoFrame> dst;
   {
     base::AutoLock lock(buffer_pool_lock_);