Tab Capture: Backing store readbacks to YV12 VideoFrames.

content/browser/renderer_host/render_widget_host_view_guest.cc

Index: content/browser/renderer_host/render_widget_host_view_guest.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_guest.cc b/content/browser/renderer_host/render_widget_host_view_guest.cc
index 6d9295e817e463372916e756b5a7a74e72ef89bb..864e93b784ea64a64db406e6e5e053617e895f07 100644
--- a/content/browser/renderer_host/render_widget_host_view_guest.cc
+++ b/content/browser/renderer_host/render_widget_host_view_guest.cc
@@ -233,6 +233,18 @@ void RenderWidgetHostViewGuest::CopyFromCompositingSurface(
   callback.Run(false, SkBitmap());
 }
 
+void RenderWidgetHostViewGuest::CopyFromCompositingSurfaceToVideoFrame(
+      const gfx::Rect& src_subrect,
+      const scoped_refptr<media::VideoFrame>& target,
+      const base::Callback<void(bool)>& callback) {
+  NOTIMPLEMENTED();
+  callback.Run(false);
+}
+
+bool RenderWidgetHostViewGuest::CanCopyToVideoFrame() const {
+  return false;
+}
+
 void RenderWidgetHostViewGuest::AcceleratedSurfaceSuspend() {
   NOTREACHED();
 }