Make Mac swap code like other platforms

gpu/ipc/service/image_transport_surface_overlay_mac.h

 // Copyright 2015 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 GPU_IPC_SERVICE_IMAGE_TRANSPORT_SURFACE_OVERLAY_MAC_H_
 #define GPU_IPC_SERVICE_IMAGE_TRANSPORT_SURFACE_OVERLAY_MAC_H_
 
 #include <list>
 #include <memory>
 #include <vector>
@@ skipping 12 matching lines @@
 
 namespace ui {
 class CALayerTreeCoordinator;
 }
 
 namespace gpu {
 
 class ImageTransportSurfaceOverlayMac : public gfx::GLSurface,
                                         public ui::GpuSwitchingObserver {
  public:
-  ImageTransportSurfaceOverlayMac(GpuChannelManager* manager,
-                                  GpuCommandBufferStub* stub,
+  ImageTransportSurfaceOverlayMac(GpuCommandBufferStub* stub,
                                   SurfaceHandle handle);
 
   // GLSurface implementation
   bool Initialize(gfx::GLSurface::Format format) override;
   void Destroy() override;
   bool Resize(const gfx::Size& size,
               float scale_factor,
               bool has_alpha) override;
   bool IsOffscreen() override;
   gfx::SwapResult SwapBuffers() override;
@@ skipping 20 matching lines @@
                        unsigned filter) override;
   bool IsSurfaceless() const override;
 
   // ui::GpuSwitchingObserver implementation.
   void OnGpuSwitched() override;
 
  private:
   ~ImageTransportSurfaceOverlayMac() override;
 
   void SetLatencyInfo(const std::vector<ui::LatencyInfo>& latency_info);
-  void BufferPresented(gpu::SurfaceHandle surface_handle,
-                       const base::TimeTicks& vsync_timebase,
-                       const base::TimeDelta& vsync_interval);
   void SendAcceleratedSurfaceBuffersSwapped(
       gpu::SurfaceHandle surface_handle,
       CAContextID ca_context_id,
       bool fullscreen_low_power_ca_context_valid,
       CAContextID fullscreen_low_power_ca_context_id,
       const gfx::ScopedRefCountedIOSurfaceMachPort& io_surface,
       const gfx::Size& size,
       float scale_factor,
       std::vector<ui::LatencyInfo> latency_info);
   gfx::SwapResult SwapBuffersInternal(const gfx::Rect& pixel_damage_rect);
 
-  GpuChannelManager* manager_;
   base::WeakPtr<GpuCommandBufferStub> stub_;
   SurfaceHandle handle_;
   std::vector<ui::LatencyInfo> latency_info_;
 
   bool use_remote_layer_api_;
   base::scoped_nsobject<CAContext> ca_context_;
   base::scoped_nsobject<CAContext> fullscreen_low_power_ca_context_;
   std::unique_ptr<ui::CALayerTreeCoordinator> ca_layer_tree_coordinator_;
 
   gfx::Size pixel_size_;
   float scale_factor_;
 
   // The renderer ID that all contexts made current to this surface should be
   // targeting.
   GLint gl_renderer_id_;
-
-  // The vsync information provided by the browser.
-  bool vsync_parameters_valid_;
-  base::TimeTicks vsync_timebase_;
-  base::TimeDelta vsync_interval_;
 };
 
 }  // namespace gpu
 
 #endif  // GPU_IPC_SERVICE_IMAGE_TRANSPORT_SURFACE_OVERLAY_MAC_H_