cc: Use the correct internal format for glCopyTexImage2D calls.

content/renderer/gpu/compositor_output_surface.cc

Index: content/renderer/gpu/compositor_output_surface.cc
diff --git a/content/renderer/gpu/compositor_output_surface.cc b/content/renderer/gpu/compositor_output_surface.cc
index 678eea5b2ca24450464927a8f584b0e561eb29fd..2c73f695474c8d9e2fc05e2abb8e9e0fc0eb1964 100644
--- a/content/renderer/gpu/compositor_output_surface.cc
+++ b/content/renderer/gpu/compositor_output_surface.cc
@@ -121,6 +121,17 @@ void CompositorOutputSurface::SwapBuffers(cc::CompositorFrame* frame) {
   client_->DidSwapBuffers();
 }
 
+void CompositorOutputSurface::BindFramebuffer() {
+  // This is a delegating output surface, no framebuffer/direct drawing support.
+  NOTREACHED();
+}
+
+uint32_t CompositorOutputSurface::GetFramebufferCopyTextureFormat() {
+  // This is a delegating output surface, no framebuffer/direct drawing support.
+  NOTREACHED();
+  return 0;
+}
+
 void CompositorOutputSurface::OnMessageReceived(const IPC::Message& message) {
   DCHECK(client_thread_checker_.CalledOnValidThread());
   if (!HasClient())