cc: Add OutputSurface state snapshots.

cc/surfaces/display.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 "cc/surfaces/display.h"
 
 #include <stddef.h>
 
 #include "base/memory/ptr_util.h"
 #include "base/trace_event/trace_event.h"
@@ skipping 209 matching lines @@
 }
 
 void Display::DidLoseContextProvider() {
   if (scheduler_)
     scheduler_->OutputSurfaceLost();
   // WARNING: The client may delete the Display in this method call. Do not
   // make any additional references to members after this call.
   client_->DisplayOutputSurfaceLost();
 }
 
+void Display::ReadbackSwappedOverlayTextures(
+    std::vector<SkBitmap>* bitmaps,
+    const base::Callback<void(bool)>& callback) {
+  renderer_->ReadbackSwappedOverlayTextures(bitmaps, callback);
+}
+
 bool Display::DrawAndSwap() {
   TRACE_EVENT0("cc", "Display::DrawAndSwap");
 
   if (current_surface_id_.is_null()) {
     TRACE_EVENT_INSTANT0("cc", "No root surface.", TRACE_EVENT_SCOPE_THREAD);
     return false;
   }
 
   if (!output_surface_) {
     TRACE_EVENT_INSTANT0("cc", "No output surface", TRACE_EVENT_SCOPE_THREAD);
@@ skipping 154 matching lines @@
 const SurfaceId& Display::CurrentSurfaceId() {
   return current_surface_id_;
 }
 
 void Display::ForceImmediateDrawAndSwapIfPossible() {
   if (scheduler_)
     scheduler_->ForceImmediateSwapIfPossible();
 }
 
 }  // namespace cc