Add relevant traces to measure copyFromCompositingSurface Turn-around time.

BUG= 399240

Review URL: https://codereview.chromium.org/424543003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@287724 0039d316-1c4b-4281-b951-d872f2087c98

cc/output/gl_renderer.cc

@@ -2194,6 +2194,7 @@ void GLRenderer::EnsureScissorTestDisabled() {
 void GLRenderer::CopyCurrentRenderPassToBitmap(
     DrawingFrame* frame,
     scoped_ptr<CopyOutputRequest> request) {
+  TRACE_EVENT0("cc", "GLRenderer::CopyCurrentRenderPassToBitmap");
   gfx::Rect copy_rect = frame->current_render_pass->output_rect;
   if (request->has_area())
     copy_rect.Intersect(request->area());

content/browser/renderer_host/render_widget_host_view_android.cc

@@ -97,6 +97,8 @@ void CopyFromCompositingSurfaceFinished(
     const base::TimeTicks& start_time,
     scoped_ptr<SkAutoLockPixels> bitmap_pixels_lock,
     bool result) {
+  TRACE_EVENT0(
+      "cc", "RenderWidgetHostViewAndroid::CopyFromCompositingSurfaceFinished");
   bitmap_pixels_lock.reset();
   release_callback->Run(0, false);
   UMA_HISTOGRAM_TIMES(kAsyncReadBackString,
@@ -731,6 +733,7 @@ void RenderWidgetHostViewAndroid::CopyFromCompositingSurface(
     const gfx::Size& dst_size,
     const base::Callback<void(bool, const SkBitmap&)>& callback,
     const SkColorType color_type) {
+  TRACE_EVENT0("cc", "RenderWidgetHostViewAndroid::CopyFromCompositingSurface");
   if ((!host_ || host_->is_hidden()) ||
       !IsReadbackConfigSupported(color_type)) {
     callback.Run(false, SkBitmap());
@@ -1543,6 +1546,8 @@ void RenderWidgetHostViewAndroid::PrepareTextureCopyOutputResult(
     scoped_ptr<cc::CopyOutputResult> result) {
   base::ScopedClosureRunner scoped_callback_runner(
       base::Bind(callback, false, SkBitmap()));
+  TRACE_EVENT0("cc",
+               "RenderWidgetHostViewAndroid::PrepareTextureCopyOutputResult");
 
   if (!result->HasTexture() || result->IsEmpty() || result->size().IsEmpty())
     return;

content/common/gpu/client/gl_helper.cc

@@ -413,6 +413,7 @@ void GLHelper::CopyTextureToImpl::ReadbackAsync(
     GLenum type,
     size_t bytes_per_pixel,
     const base::Callback<void(bool)>& callback) {
+  TRACE_EVENT0("mirror", "GLHelper::CopyTextureToImpl::ReadbackAsync");
   Request* request =
       new Request(dst_size, bytes_per_row, row_stride_bytes, out, callback);
   request_queue_.push(request);