Mus: GpuCompositorFrameSink uses WeakPtrFactory

services/ui/surfaces/gpu_compositor_frame_sink.h

Index: services/ui/surfaces/gpu_compositor_frame_sink.h
diff --git a/services/ui/surfaces/gpu_compositor_frame_sink.h b/services/ui/surfaces/gpu_compositor_frame_sink.h
index 1a1422ddb53856036676ae525d8940899f000b8c..f32b9f7da9a9f5bfbcbf96c7596dd057a6d0fd81 100644
--- a/services/ui/surfaces/gpu_compositor_frame_sink.h
+++ b/services/ui/surfaces/gpu_compositor_frame_sink.h
@@ -10,6 +10,7 @@
 
 #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"
@@ -129,6 +130,8 @@ class GpuCompositorFrameSink : public cc::mojom::MojoCompositorFrameSink,
   mojo::Binding<cc::mojom::MojoCompositorFrameSink> binding_;
   mojo::Binding<cc::mojom::MojoCompositorFrameSinkPrivate> private_binding_;
 
+  base::WeakPtrFactory<GpuCompositorFrameSink> weak_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(GpuCompositorFrameSink);
 };