Implement webview.captureVisibleRegion()

content/browser/compositor/delegated_frame_host.cc

Index: content/browser/compositor/delegated_frame_host.cc
diff --git a/content/browser/compositor/delegated_frame_host.cc b/content/browser/compositor/delegated_frame_host.cc
index f381da0eaddfc8f190cda971b0cfb1afac5abd6b..940cf6de2bbd8400b420a75c53a2bbef63120740 100644
--- a/content/browser/compositor/delegated_frame_host.cc
+++ b/content/browser/compositor/delegated_frame_host.cc
@@ -592,6 +592,7 @@ void DelegatedFrameHost::EvictDelegatedFrame() {
   delegated_frame_evictor_->DiscardedFrame();
 }
 
+// TODO(wjmaclean): Remove this and get from readback_request_helpers.h instead.
 // static
 void DelegatedFrameHost::CopyFromCompositingSurfaceHasResult(
     const gfx::Size& dst_size_in_pixel,
@@ -622,6 +623,7 @@ void DelegatedFrameHost::CopyFromCompositingSurfaceHasResult(
                                 std::move(result));
 }
 
+// TODO(wjmaclean): Remove this and get from readback_request_helpers.h instead.
 static void CopyFromCompositingSurfaceFinished(
     const ReadbackRequestCallback& callback,
     scoped_ptr<cc::SingleReleaseCallback> release_callback,
@@ -643,6 +645,7 @@ static void CopyFromCompositingSurfaceFinished(
                result ? content::READBACK_SUCCESS : content::READBACK_FAILED);
 }
 
+// TODO(wjmaclean): Remove this and get from readback_request_helpers.h instead.
 // static
 void DelegatedFrameHost::PrepareTextureCopyOutputResult(
     const gfx::Size& dst_size_in_pixel,
@@ -690,6 +693,7 @@ void DelegatedFrameHost::PrepareTextureCopyOutputResult(
       GLHelper::SCALER_QUALITY_GOOD);
 }
 
+// TODO(wjmaclean): Remove this and get from readback_request_helpers.h instead.
 // static
 void DelegatedFrameHost::PrepareBitmapCopyOutputResult(
     const gfx::Size& dst_size_in_pixel,
@@ -1049,9 +1053,10 @@ void DelegatedFrameHost::RequestCopyOfOutput(
     scoped_ptr<cc::CopyOutputRequest> request) {
   if (!request_copy_of_output_callback_for_testing_.is_null())
     request_copy_of_output_callback_for_testing_.Run(std::move(request));
-  else
+  else {
     client_->DelegatedFrameHostGetLayer()->RequestCopyOfOutput(
         std::move(request));
+  }
 }
 
 void DelegatedFrameHost::UnlockResources() {