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

content/browser/compositor/browser_compositor_output_surface.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/compositor/browser_compositor_output_surface.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/strings/string_number_conversions.h"
 #include "content/browser/compositor/browser_compositor_overlay_candidate_validator.h"
+#include "content/browser/compositor/owned_mailbox.h"
 #include "content/browser/compositor/reflector_impl.h"
 #include "content/common/gpu/client/context_provider_command_buffer.h"
 
 namespace content {
 
 BrowserCompositorOutputSurface::BrowserCompositorOutputSurface(
     const scoped_refptr<cc::ContextProvider>& context_provider,
     const scoped_refptr<ui::CompositorVSyncManager>& vsync_manager,
     scoped_ptr<BrowserCompositorOverlayCandidateValidator>
         overlay_candidate_validator)
@@ skipping 52 matching lines @@
 
 void BrowserCompositorOutputSurface::SetReflector(ReflectorImpl* reflector) {
   // Software mirroring is done by doing a GL copy out of the framebuffer - if
   // we have overlays then that data will be missing.
   if (overlay_candidate_validator_) {
     overlay_candidate_validator_->SetSoftwareMirrorMode(reflector != nullptr);
   }
   reflector_ = reflector;
 }
 
+scoped_refptr<OwnedMailbox>
+BrowserCompositorOutputSurface::GetTextureMailbox() {
+  return scoped_refptr<OwnedMailbox>();
+}
+
+base::Closure
+BrowserCompositorOutputSurface::CreateCompositionStartedCallback() {
+  return base::Closure();
+}
+
 cc::OverlayCandidateValidator*
 BrowserCompositorOutputSurface::GetOverlayCandidateValidator() const {
   return overlay_candidate_validator_.get();
 }
 
 }  // namespace content