Mus: GpuCompositorFrameSink uses WeakPtrFactory

services/ui/surfaces/gpu_compositor_frame_sink.h

 // Copyright 2015 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.
 
 #ifndef SERVICES_UI_SURFACES_GPU_COMPOSITOR_FRAME_SINK_H_
 #define SERVICES_UI_SURFACES_GPU_COMPOSITOR_FRAME_SINK_H_
 
 #include <memory>
 #include <set>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
+#include "base/memory/weak_ptr.h"
 #include "cc/ipc/compositor_frame.mojom.h"
 #include "cc/ipc/mojo_compositor_frame_sink.mojom.h"
 #include "cc/output/context_provider.h"
 #include "cc/output/in_process_context_provider.h"
 #include "cc/scheduler/begin_frame_source.h"
 #include "cc/surfaces/display.h"
 #include "cc/surfaces/display_client.h"
 #include "cc/surfaces/frame_sink_id.h"
 #include "cc/surfaces/surface_factory.h"
 #include "cc/surfaces/surface_factory_client.h"
@@ skipping 99 matching lines @@
   // Whether a request for begin frames has been issued.
   bool needs_begin_frame_ = false;
 
   // Whether or not a frame observer has been added.
   bool added_frame_observer_ = false;
 
   cc::mojom::MojoCompositorFrameSinkClientPtr client_;
   mojo::Binding<cc::mojom::MojoCompositorFrameSink> binding_;
   mojo::Binding<cc::mojom::MojoCompositorFrameSinkPrivate> private_binding_;
 
+  base::WeakPtrFactory<GpuCompositorFrameSink> weak_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(GpuCompositorFrameSink);
 };
 
 }  // namespace ui
 
 #endif  // SERVICES_UI_SURFACES_GPU_COMPOSITOR_FRAME_SINK_H_