Command to mark surface inactive, so gpu process can release resources.

content/renderer/gpu/command_buffer_proxy.cc

 // Copyright (c) 2011 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.
 
 #include "content/renderer/gpu/command_buffer_proxy.h"
 
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/process_util.h"
 #include "base/shared_memory.h"
@@ skipping 349 matching lines @@
 
   if (!Send(new GpuChannelMsg_Echo(GpuCommandBufferMsg_EchoAck(route_id_)))) {
     return false;
   }
 
   echo_tasks_.push(callback);
 
   return true;
 }
 
+bool CommandBufferProxy::SetSurfaceVisible(bool visible) {
+  if (last_state_.error != gpu::error::kNoError) {
+    return false;
+  }
+
+  return Send(new GpuCommandBufferMsg_SetSurfaceVisible(route_id_, visible));
+}
+
+
 bool CommandBufferProxy::SetParent(CommandBufferProxy* parent_command_buffer,
                                    uint32 parent_texture_id) {
   if (last_state_.error != gpu::error::kNoError)
     return false;
 
   bool result;
   if (parent_command_buffer) {
     if (!Send(new GpuCommandBufferMsg_SetParent(
         route_id_,
         parent_command_buffer->route_id_,
@@ skipping 61 matching lines @@
   delete msg;
   return false;
 }
 
 void CommandBufferProxy::OnUpdateState(const gpu::CommandBuffer::State& state) {
   // Handle wraparound. It works as long as we don't have more than 2B state
   // updates in flight across which reordering occurs.
   if (state.generation - last_state_.generation < 0x80000000U)
     last_state_ = state;
 }