Fix Mac resize, delete more Mac code

gpu/ipc/client/gpu_channel_host.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 GPU_IPC_CLIENT_GPU_CHANNEL_HOST_H_
 #define GPU_IPC_CLIENT_GPU_CHANNEL_HOST_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 99 matching lines @@
 
   // Create and connect to a command buffer in the GPU process.
   std::unique_ptr<CommandBufferProxyImpl> CreateCommandBuffer(
       gpu::SurfaceHandle surface_handle,
       const gfx::Size& size,
       CommandBufferProxyImpl* share_group,
       int32_t stream_id,
       gpu::GpuStreamPriority stream_priority,
       const std::vector<int32_t>& attribs,
       const GURL& active_url,
-      gfx::GpuPreference gpu_preference);
+      gfx::GpuPreference gpu_preference,
+      scoped_refptr<base::SingleThreadTaskRunner> task_runner);
 
   // Destroy a command buffer created by this channel.
   void DestroyCommandBuffer(CommandBufferProxyImpl* command_buffer);
 
   // Destroy this channel. Must be called on the main thread, before
   // destruction.
   void DestroyChannel();
 
   // Add a message route for the current message loop.
   void AddRoute(int route_id, base::WeakPtr<IPC::Listener> listener);
@@ skipping 161 matching lines @@
   mutable base::Lock context_lock_;
   std::unique_ptr<IPC::SyncChannel> channel_;
   base::hash_map<int32_t, StreamFlushInfo> stream_flush_info_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuChannelHost);
 };
 
 }  // namespace gpu
 
 #endif  // GPU_IPC_CLIENT_GPU_CHANNEL_HOST_H_