WIP: Propagate SurfaceID up window tree hierarchy

services/ui/ws/frame_generator.h

 // Copyright 2016 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_WS_FRAME_GENERATOR_H_
 #define SERVICES_UI_WS_FRAME_GENERATOR_H_
 
 #include <memory>
 
 #include "base/macros.h"
 #include "base/timer/timer.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/native_widget_types.h"
 
 namespace cc {
 class CompositorFrame;
 class CopyOutputRequest;
 class RenderPass;
 }
 
 namespace gpu {
 class GpuChannelHost;
 }
 
 namespace ui {
 
+namespace surfaces {
+class CompositorFrameSink;
 class DisplayCompositor;
-class SurfacesState;
+}
 
 namespace ws {
 
 namespace test {
 class FrameGeneratorTest;
 }
 
 class FrameGeneratorDelegate;
 class ServerWindow;
 
 // Responsible for redrawing the display in response to the redraw requests by
-// submitting CompositorFrames to the owned DisplayCompositor.
+// submitting CompositorFrames to the owned CompositorFrameSink.
 class FrameGenerator {
  public:
   FrameGenerator(FrameGeneratorDelegate* delegate,
-                 scoped_refptr<SurfacesState> surfaces_state);
+                 scoped_refptr<surfaces::DisplayCompositor> display_compositor);
   virtual ~FrameGenerator();
 
   void OnGpuChannelEstablished(scoped_refptr<gpu::GpuChannelHost> gpu_channel);
 
   // Schedules a redraw for the provided region.
   void RequestRedraw(const gfx::Rect& redraw_region);
   void OnAcceleratedWidgetAvailable(gfx::AcceleratedWidget widget);
   void RequestCopyOfOutput(
       std::unique_ptr<cc::CopyOutputRequest> output_request);
 
   bool is_frame_pending() { return frame_pending_; }
 
  private:
   friend class ui::ws::test::FrameGeneratorTest;
 
   void WantToDraw();
 
   // This method initiates a top level redraw of the display.
   // TODO(fsamuel): This should use vblank as a signal rather than a timer
   // http://crbug.com/533042
   void Draw();
 
-  // This is called after the DisplayCompositor has completed generating a new
+  // This is called after the CompositorFrameSink has completed generating a new
   // frame for the display. TODO(fsamuel): Idle time processing should happen
   // here if there is budget for it.
   void DidDraw();
 
   // Generates the CompositorFrame for the current |dirty_rect_|.
   cc::CompositorFrame GenerateCompositorFrame(
       const gfx::Rect& output_rect) const;
 
   // DrawWindowTree recursively visits ServerWindows, creating a SurfaceDrawQuad
   // for each that lacks one.
   void DrawWindowTree(cc::RenderPass* pass,
                       ServerWindow* window,
                       const gfx::Vector2d& parent_to_root_origin_offset,
                       float opacity,
                       bool* may_contain_video) const;
 
   FrameGeneratorDelegate* delegate_;
-  scoped_refptr<SurfacesState> surfaces_state_;
+  scoped_refptr<surfaces::DisplayCompositor> display_compositor_;
   scoped_refptr<gpu::GpuChannelHost> gpu_channel_;
 
-  std::unique_ptr<DisplayCompositor> display_compositor_;
+  std::unique_ptr<surfaces::CompositorFrameSink> compositor_frame_sink_;
   gfx::AcceleratedWidget widget_ = gfx::kNullAcceleratedWidget;
 
   // The region that needs to be redrawn next time the compositor frame is
   // generated.
   gfx::Rect dirty_rect_;
   base::Timer draw_timer_;
   bool frame_pending_ = false;
   bool may_contain_video_ = false;
 
   base::WeakPtrFactory<FrameGenerator> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(FrameGenerator);
 };
 
 }  // namespace ws
 
 }  // namespace ui
 
 #endif  // SERVICES_UI_WS_FRAME_GENERATOR_H_