Move ReferencedSurfaceTracker into GpuCompositorFrameSink.

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 "cc/ipc/display_compositor.mojom.h"
-#include "cc/surfaces/embedded_surface_tracker.h"
 #include "cc/surfaces/frame_sink_id.h"
 #include "cc/surfaces/surface_id.h"
 #include "cc/surfaces/surface_id_allocator.h"
 #include "cc/surfaces/surface_reference.h"
 #include "services/ui/public/interfaces/window_tree_constants.mojom.h"
 #include "services/ui/ws/ids.h"
 #include "services/ui/ws/server_window_delegate.h"
 #include "services/ui/ws/server_window_tracker.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/native_widget_types.h"
@@ skipping 21 matching lines @@
   FrameGenerator(FrameGeneratorDelegate* delegate, ServerWindow* root_window);
   ~FrameGenerator() override;
 
   void set_device_scale_factor(float device_scale_factor) {
     device_scale_factor_ = device_scale_factor;
   }
 
   // Schedules a redraw for the provided region.
   void OnAcceleratedWidgetAvailable(gfx::AcceleratedWidget widget);
 
-  // Adds a reference to new surface with |surface_id| for |window|. This
-  // reference is to ensure the surface is not deleted while it's still being
-  // displayed. The display root surface has a reference from the top level
-  // root. All child surfaces are embedded by the display root and receive a
-  // reference from it.
-  //
-  // If a new display root Surface is created, then all child surfaces will
-  // receive a reference from the new display root so they are not deleted with
-  // the old display root.
-  //
-  // If there is an existing reference to an old surface with the same
-  // FrameSinkId then that reference will be removed after the next
-  // CompositorFrame is submitted.
+  // If |window| corresponds to the active WM for the display then update
+  // |window_manager_surface_id_|.
   void OnSurfaceCreated(const cc::SurfaceId& surface_id, ServerWindow* window);
 
  private:
   friend class ui::ws::test::FrameGeneratorTest;
 
   // cc::mojom::MojoCompositorFrameSinkClient implementation:
   void DidReceiveCompositorFrameAck() override;
   void OnBeginFrame(const cc::BeginFrameArgs& begin_frame_arags) override;
   void ReclaimResources(const cc::ReturnedResourceArray& resources) override;
   void WillDrawSurface() override;
 
-  // Updates the display surface SurfaceId using new value in |local_frame_id_|.
-  void UpdateDisplaySurfaceId();
-
   // Generates the CompositorFrame.
   cc::CompositorFrame GenerateCompositorFrame(const gfx::Rect& output_rect);
 
   // DrawWindow creates SurfaceDrawQuad for the provided ServerWindow and
   // appends it to the provided cc::RenderPass.
   void DrawWindow(cc::RenderPass* pass, ServerWindow* window);
 
   // ServerWindowObserver implementation.
   void OnWindowDestroying(ServerWindow* window) override;
 
   FrameGeneratorDelegate* delegate_;
   ServerWindow* const root_window_;
   float device_scale_factor_ = 1.f;
 
   gfx::Size last_submitted_frame_size_;
   cc::LocalFrameId local_frame_id_;
   cc::SurfaceIdAllocator id_allocator_;
   cc::mojom::MojoCompositorFrameSinkPtr compositor_frame_sink_;
   cc::mojom::DisplayPrivatePtr display_private_;
 
-  // Tracks surface references for embedded surfaces.
-  cc::EmbeddedSurfaceTracker surface_tracker_;
+  cc::SurfaceId window_manager_surface_id_;
 
   mojo::Binding<cc::mojom::MojoCompositorFrameSinkClient> binding_;
 
   base::WeakPtrFactory<FrameGenerator> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(FrameGenerator);
 };
 
 }  // namespace ws
 
 }  // namespace ui
 
 #endif  // SERVICES_UI_WS_FRAME_GENERATOR_H_