Mac: Clean up ImageTransportSurfaceOverlayMac timing

gpu/ipc/service/image_transport_surface_overlay_mac.h

Index: gpu/ipc/service/image_transport_surface_overlay_mac.h
diff --git a/gpu/ipc/service/image_transport_surface_overlay_mac.h b/gpu/ipc/service/image_transport_surface_overlay_mac.h
index dde6109abaf8d5fc9f6081496802da90fc62354a..e455cf004167d2d7f5a31f57ce8c82f0881d3603 100644
--- a/gpu/ipc/service/image_transport_surface_overlay_mac.h
+++ b/gpu/ipc/service/image_transport_surface_overlay_mac.h
@@ -45,7 +45,6 @@ class ImageTransportSurfaceOverlayMac : public gfx::GLSurface,
   gfx::Size GetSize() override;
   void* GetHandle() override;
   bool OnMakeCurrent(gfx::GLContext* context) override;
-  bool SetBackbufferAllocation(bool allocated) override;
   bool ScheduleOverlayPlane(int z_order,
                             gfx::OverlayTransform transform,
                             gl::GLImage* image,
@@ -67,9 +66,6 @@ class ImageTransportSurfaceOverlayMac : public gfx::GLSurface,
   void OnGpuSwitched() override;
 
  private:
-  class PendingSwap;
-  class OverlayPlane;
-
   ~ImageTransportSurfaceOverlayMac() override;
 
   void SetLatencyInfo(const std::vector<ui::LatencyInfo>& latency_info);
@@ -85,31 +81,6 @@ class ImageTransportSurfaceOverlayMac : public gfx::GLSurface,
       std::vector<ui::LatencyInfo> latency_info);
   gfx::SwapResult SwapBuffersInternal(const gfx::Rect& pixel_damage_rect);
 
-  // Returns true if the front of |pending_swaps_| has completed, or has timed
-  // out by |now|.
-  bool IsFirstPendingSwapReadyToDisplay(
-    const base::TimeTicks& now);
-  // Sets the CALayer contents to the IOSurface for the front of
-  // |pending_swaps_|, and removes it from the queue.
-  void DisplayFirstPendingSwapImmediately();
-  // Force that all of |pending_swaps_| displayed immediately, and the list be
-  // cleared.
-  void DisplayAndClearAllPendingSwaps();
-  // Callback issued during the next vsync period ofter a SwapBuffers call,
-  // to check if the swap is completed, and display the frame. Note that if
-  // another SwapBuffers happens before this callback, the pending swap will
-  // be tested at that time, too.
-  void CheckPendingSwapsCallback();
-  // Function to post the above callback. The argument |now| is passed as an
-  // argument to avoid redundant calls to base::TimeTicks::Now.
-  void PostCheckPendingSwapsCallbackIfNeeded(const base::TimeTicks& now);
-
-  // Return the time of |interval_fraction| of the way through the next
-  // vsync period that starts after |from|. If the vsync parameters are not
-  // valid then return |from|.
-  base::TimeTicks GetNextVSyncTimeAfter(
-      const base::TimeTicks& from, double interval_fraction);
-
   GpuChannelManager* manager_;
   base::WeakPtr<GpuCommandBufferStub> stub_;
   SurfaceHandle handle_;
@@ -131,26 +102,14 @@ class ImageTransportSurfaceOverlayMac : public gfx::GLSurface,
   scoped_ptr<CALayerPartialDamageTree> pending_partial_damage_tree_;
   scoped_ptr<CALayerTree> pending_ca_layer_tree_;
 
-  // A queue of all frames that have been created by SwapBuffersInternal but
-  // have not yet been displayed. This queue is checked at the beginning of
-  // every swap and also by a callback.
-  std::deque<linked_ptr<PendingSwap>> pending_swaps_;
-
   // The planes that are currently being displayed on the screen.
   scoped_ptr<CALayerPartialDamageTree> current_partial_damage_tree_;
   scoped_ptr<CALayerTree> current_ca_layer_tree_;
 
-  // The time of the last swap was issued. If this is more than two vsyncs, then
-  // use the simpler non-smooth animation path.
-  base::TimeTicks last_swap_time_;
-
   // The vsync information provided by the browser.
   bool vsync_parameters_valid_;
   base::TimeTicks vsync_timebase_;
   base::TimeDelta vsync_interval_;
-
-  base::Timer display_pending_swap_timer_;
-  base::WeakPtrFactory<ImageTransportSurfaceOverlayMac> weak_factory_;
 };
 
 }  // namespace gpu