Privatize StrongBinding lifetime management

services/ui/gpu/display_compositor/compositor_frame_sink_factory_impl.h

Index: services/ui/gpu/display_compositor/compositor_frame_sink_factory_impl.h
diff --git a/services/ui/gpu/display_compositor/compositor_frame_sink_factory_impl.h b/services/ui/gpu/display_compositor/compositor_frame_sink_factory_impl.h
index 004f264bb73750723d131140a29562b33766f71b..96cbf3818234661102d2d25cbb4a2766463a126e 100644
--- a/services/ui/gpu/display_compositor/compositor_frame_sink_factory_impl.h
+++ b/services/ui/gpu/display_compositor/compositor_frame_sink_factory_impl.h
@@ -6,7 +6,6 @@
 #define SERVICES_UI_GPU_DISPLAY_COMPOSITOR_COMPOSITOR_FRAME_SINK_FACTORY_IMPL_H_
 
 #include "cc/surfaces/surface_id_allocator.h"
-#include "mojo/public/cpp/bindings/strong_binding.h"
 #include "services/ui/gpu/display_compositor/compositor_frame_sink_delegate.h"
 #include "services/ui/public/interfaces/gpu/display_compositor.mojom.h"
 #include "services/ui/surfaces/surfaces_state.h"
@@ -21,7 +20,6 @@ class CompositorFrameSinkFactoryImpl : public mojom::CompositorFrameSinkFactory,
  public:
   CompositorFrameSinkFactoryImpl(
       uint32_t client_id,
-      mojo::InterfaceRequest<mojom::CompositorFrameSinkFactory> request,
       const scoped_refptr<SurfacesState>& surfaces_state);
   ~CompositorFrameSinkFactoryImpl() override;
 
@@ -44,7 +42,6 @@ class CompositorFrameSinkFactoryImpl : public mojom::CompositorFrameSinkFactory,
   using CompositorFrameSinkMap =
       std::map<uint32_t, std::unique_ptr<CompositorFrameSinkImpl>>;
   CompositorFrameSinkMap sinks_;
-  mojo::StrongBinding<mojom::CompositorFrameSinkFactory> binding_;
 
   DISALLOW_COPY_AND_ASSIGN(CompositorFrameSinkFactoryImpl);
 };