Draw the offscreen texture to reflector's surface without extra copy

content/browser/compositor/browser_compositor_output_surface.cc

Index: content/browser/compositor/browser_compositor_output_surface.cc
diff --git a/content/browser/compositor/browser_compositor_output_surface.cc b/content/browser/compositor/browser_compositor_output_surface.cc
index 6839457196ed4eb2fccdf4c621ad2054e5a00b47..2038725bc8650980e8b98990f7ed0518746c27a9 100644
--- a/content/browser/compositor/browser_compositor_output_surface.cc
+++ b/content/browser/compositor/browser_compositor_output_surface.cc
@@ -78,6 +78,16 @@ void BrowserCompositorOutputSurface::SetReflector(ReflectorImpl* reflector) {
     overlay_candidate_validator_->SetSoftwareMirrorMode(reflector != nullptr);
   }
   reflector_ = reflector;
+
+  OnReflectorChanged();
+}
+
+void BrowserCompositorOutputSurface::OnReflectorChanged() {
+}
+
+base::Closure
+BrowserCompositorOutputSurface::CreateCompositionStartedCallback() {
+  return base::Closure();
 }
 
 cc::OverlayCandidateValidator*