Fix Mac resize, delete more Mac code

content/browser/gpu/gpu_surface_tracker.h

 // Copyright (c) 2012 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 CONTENT_BROWSER_GPU_GPU_SURFACE_TRACKER_H_
 #define CONTENT_BROWSER_GPU_GPU_SURFACE_TRACKER_H_
 
 #include <stddef.h>
 
 #include <map>
@@ skipping 10 matching lines @@
 
 // This class is used on Android and Mac, and is responsible for tracking native
 // window surfaces exposed to the GPU process. Every surface gets registered to
 // this class, and gets a handle.  The handle can be passed to
 // GpuChannelHost::CreateCommandBuffer or to
 // GpuMemoryBufferManager::AllocateGpuMemoryBuffer.
 // On Android, the handle is used in the GPU process to get a reference to the
 // ANativeWindow, using GpuSurfaceLookup (implemented by
 // SurfaceTextureManagerImpl).
 // On Mac, the handle just passes through the GPU process, and is sent back via
-// GpuHostMsg_AcceleratedSurfaceBuffersSwapped to reference the surface.
+// GpuCommandBufferMsg_SwapBuffersCompleted to reference the surface.
 // This class is thread safe.
 class CONTENT_EXPORT GpuSurfaceTracker : public gpu::GpuSurfaceLookup {
  public:
   // GpuSurfaceLookup implementation:
   // Returns the native widget associated with a given surface_handle.
   // On Android, this adds a reference on the ANativeWindow.
   gfx::AcceleratedWidget AcquireNativeWidget(
       gpu::SurfaceHandle surface_handle) override;
 
 #if defined(OS_ANDROID)
@@ skipping 27 matching lines @@
   base::Lock lock_;
   SurfaceMap surface_map_;
   int next_surface_handle_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuSurfaceTracker);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_GPU_GPU_SURFACE_TRACKER_H_