gpu: Implement idle async pixel transfers.

content/common/gpu/gpu_channel_manager.cc

 // 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.
 
 #include "content/common/gpu/gpu_channel_manager.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "content/common/child_thread.h"
 #include "content/common/gpu/gpu_channel.h"
@@ skipping 241 matching lines @@
     delete image_operations_.front();
     image_operations_.pop_front();
   }
 }
 
 void GpuChannelManager::OnLoadedShader(std::string program_proto) {
   if (program_cache())
     program_cache()->LoadProgram(program_proto);
 }
 
+bool GpuChannelManager::HandleMessagesScheduled() {
+  for (GpuChannelMap::iterator iter = gpu_channels_.begin();
+       iter != gpu_channels_.end(); ++iter) {
+    if (iter->second->handle_messages_scheduled())
+      return true;
+  }
+  return false;
+}
+
+uint64 GpuChannelManager::MessagesProcessed() {
+  uint64 messages_processed = 0;
+
+  for (GpuChannelMap::iterator iter = gpu_channels_.begin();
+       iter != gpu_channels_.end(); ++iter) {
+    messages_processed += iter->second->messages_processed();
+  }
+  return messages_processed;
+}
+
 void GpuChannelManager::LoseAllContexts() {
   MessageLoop::current()->PostTask(
       FROM_HERE,
       base::Bind(&GpuChannelManager::OnLoseAllContexts,
                  weak_factory_.GetWeakPtr()));
 }
 
 void GpuChannelManager::OnLoseAllContexts() {
   gpu_channels_.clear();
 }
 
 gfx::GLSurface* GpuChannelManager::GetDefaultOffscreenSurface() {
   if (!default_offscreen_surface_.get()) {
     default_offscreen_surface_ = gfx::GLSurface::CreateOffscreenGLSurface(
         false, gfx::Size(1, 1));
   }
   return default_offscreen_surface_.get();
 }
 
 }  // namespace content