Extract non-Mojo bits of GpuCompositorFrameSink to CompositorFrameSinkSupport

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 5da93934da8749b4cc175aac09f9f046c36c1362..f50ebad5ad29a2a77ab6285ab225597279adcc06 100644
--- a/services/ui/surfaces/gpu_compositor_frame_sink.h
+++ b/services/ui/surfaces/gpu_compositor_frame_sink.h
@@ -5,21 +5,11 @@
 #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/scheduler/begin_frame_source.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"
-#include "cc/surfaces/surface_id.h"
-#include "cc/surfaces/surface_id_allocator.h"
+#include "cc/surfaces/compositor_frame_sink_support.h"
+#include "cc/surfaces/compositor_frame_sink_support_client.h"
 #include "mojo/public/cpp/bindings/binding.h"
 
 namespace cc {
@@ -31,11 +21,10 @@ namespace ui {
 class DisplayCompositor;
 
 // Server side representation of a WindowSurface.
-class GpuCompositorFrameSink : public cc::mojom::MojoCompositorFrameSink,
-                               public cc::DisplayClient,
-                               public cc::mojom::MojoCompositorFrameSinkPrivate,
-                               public cc::SurfaceFactoryClient,
-                               public cc::BeginFrameObserver {
+class GpuCompositorFrameSink
+    : public cc::CompositorFrameSinkSupportClient,
+      public cc::mojom::MojoCompositorFrameSink,
+      public cc::mojom::MojoCompositorFrameSinkPrivate {
  public:
   GpuCompositorFrameSink(
       DisplayCompositor* display_compositor,
@@ -58,65 +47,25 @@ class GpuCompositorFrameSink : public cc::mojom::MojoCompositorFrameSink,
       const cc::FrameSinkId& child_frame_sink_id) override;
 
  private:
-  void DidReceiveCompositorFrameAck();
-
-  // cc::DisplayClient implementation.
-  void DisplayOutputSurfaceLost() override;
-  void DisplayWillDrawAndSwap(bool will_draw_and_swap,
-                              const cc::RenderPassList& render_passes) override;
-  void DisplayDidDrawAndSwap() override;
-
-  // cc::SurfaceFactoryClient implementation.
-  void ReturnResources(const cc::ReturnedResourceArray& resources) override;
-  void SetBeginFrameSource(cc::BeginFrameSource* begin_frame_source) override;
-
-  // cc::BeginFrameObserver implementation.
+  // cc::CompositorFrameSinkSupportClient implementation:
+  void DidReceiveCompositorFrameAck() override;
   void OnBeginFrame(const cc::BeginFrameArgs& args) override;
-  const cc::BeginFrameArgs& LastUsedBeginFrameArgs() const override;
-  void OnBeginFrameSourcePausedChanged(bool paused) override;
-
-  void UpdateNeedsBeginFramesInternal();
+  void ReclaimResources(const cc::ReturnedResourceArray& resources) override;
 
   void OnClientConnectionLost();
   void OnPrivateConnectionLost();
 
-  const cc::FrameSinkId frame_sink_id_;
-
-  DisplayCompositor* const display_compositor_;  // owns this.
+  DisplayCompositor* const display_compositor_;
 
-  // GpuCompositorFrameSink holds a cc::Display if it created with
-  // non-null gpu::SurfaceHandle. In the window server, the display root
-  // window's CompositorFrameSink will have a valid gpu::SurfaceHandle.
-  std::unique_ptr<cc::Display> display_;
-
-  cc::LocalFrameId local_frame_id_;
-  cc::SurfaceFactory surface_factory_;
-  // Counts the number of CompositorFrames that have been submitted and have not
-  // yet received an ACK.
-  int ack_pending_count_ = 0;
-  cc::ReturnedResourceArray surface_returned_resources_;
+  cc::CompositorFrameSinkSupport support_;
 
   bool client_connection_lost_ = false;
   bool private_connection_lost_ = false;
 
-  // The begin frame source being observered. Null if none.
-  cc::BeginFrameSource* begin_frame_source_ = nullptr;
-
-  // The last begin frame args generated by the begin frame source.
-  cc::BeginFrameArgs last_begin_frame_args_;
-
-  // 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);
 };