Cleanup SurfaceVisibility code.

content/common/gpu/gpu_messages.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.
 
 // Multiply-included message file, hence no include guard here, but see below
 // for a much smaller-than-usual include guard section.
 
 #include <string>
 #include <vector>
 
@@ skipping 603 matching lines @@
 // Tells the browser that SwapBuffers returned and passes latency info
 IPC_MESSAGE_ROUTED2(GpuCommandBufferMsg_SwapBuffersCompleted,
                     std::vector<ui::LatencyInfo> /* latency_info */,
                     gfx::SwapResult /* result */)
 
 // Tells the browser about updated parameters for vsync alignment.
 IPC_MESSAGE_ROUTED2(GpuCommandBufferMsg_UpdateVSyncParameters,
                     base::TimeTicks /* timebase */,
                     base::TimeDelta /* interval */)
 
-// Send to stub on surface visibility change.
-IPC_MESSAGE_ROUTED1(GpuCommandBufferMsg_SetSurfaceVisible, bool /* visible */)
-
 // Inserts a sync point into the channel. This is handled on the IO thread, so
 // can be expected to be reasonably fast, but the sync point is actually
 // retired in order with respect to the other calls. The sync point is shared
 // across channels.
 IPC_SYNC_MESSAGE_ROUTED1_1(GpuCommandBufferMsg_InsertSyncPoint,
                            bool /* retire */,
                            uint32 /* sync_point */)
 
 // Retires the sync point.
 IPC_MESSAGE_ROUTED1(GpuCommandBufferMsg_RetireSyncPoint,
@@ skipping 177 matching lines @@
 IPC_MESSAGE_ROUTED0(AcceleratedJpegDecoderMsg_Destroy)
 
 //------------------------------------------------------------------------------
 // Accelerated JPEG Decoder Host Messages
 // These messages are sent from the GPU process to Browser process.
 //
 // Report decode status.
 IPC_MESSAGE_ROUTED2(AcceleratedJpegDecoderHostMsg_DecodeAck,
                     int32, /* bitstream_buffer_id */
                     media::JpegDecodeAccelerator::Error /* error */)