cc: Move ownership of surfaces to SurfaceManager

cc/surfaces/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 "cc/surfaces/surface.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 12 matching lines @@
 static const int kFrameIndexStart = 2;
 
 Surface::Surface(
     const SurfaceInfo& surface_info,
     base::WeakPtr<CompositorFrameSinkSupport> compositor_frame_sink_support)
     : surface_info_(surface_info),
       previous_frame_surface_id_(surface_info.id()),
       compositor_frame_sink_support_(std::move(compositor_frame_sink_support)),
       surface_manager_(compositor_frame_sink_support_->surface_manager()),
       frame_index_(kFrameIndexStart),
-      destroyed_(false) {}
+      destroyed_(false),
+      weak_factory_(this) {}
 
 Surface::~Surface() {
   ClearCopyRequests();
   surface_manager_->SurfaceDiscarded(this);
 
   UnrefFrameResourcesAndRunDrawCallback(std::move(pending_frame_data_));
   UnrefFrameResourcesAndRunDrawCallback(std::move(active_frame_data_));
 }
 
 void Surface::SetPreviousFrameSurface(Surface* surface) {
@@ skipping 325 matching lines @@
   if (latency_info->empty()) {
     frame->metadata.latency_info.swap(*latency_info);
     return;
   }
   std::copy(frame->metadata.latency_info.begin(),
             frame->metadata.latency_info.end(),
             std::back_inserter(*latency_info));
   frame->metadata.latency_info.clear();
 }
 
+base::WeakPtr<Surface> Surface::AsWeakPtr() {
+  return weak_factory_.GetWeakPtr();
+}
+
 }  // namespace cc