WIP - Gutterless resize on Windows

content/browser/gpu/browser_gpu_channel_host_factory.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/browser/gpu/browser_gpu_channel_host_factory.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/location.h"
 #include "base/profiler/scoped_tracker.h"
@@ skipping 10 matching lines @@
 #include "content/browser/gpu/shader_disk_cache.h"
 #include "content/common/child_process_host_impl.h"
 #include "content/common/gpu/gpu_messages.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/browser/gpu_data_manager.h"
 #include "content/public/common/content_client.h"
 #include "gpu/command_buffer/service/gpu_switches.h"
 #include "ipc/ipc_channel_handle.h"
 #include "ipc/message_filter.h"
+#include "ui/base/window_resize_helper.h"
 
 namespace content {
 
 BrowserGpuChannelHostFactory* BrowserGpuChannelHostFactory::instance_ = NULL;
 
 struct BrowserGpuChannelHostFactory::CreateRequest {
   CreateRequest(int32 route_id)
       : event(true, false),
         gpu_host_id(0),
         route_id(route_id),
@@ skipping 296 matching lines @@
   // In this case we need to wait for this before we can show any UI /anyway/,
   // so it won't cause additional jank.
   // TODO(piman): Make this asynchronous (http://crbug.com/125248).
   TRACE_EVENT0("browser",
                "BrowserGpuChannelHostFactory::CreateViewCommandBuffer");
   base::ThreadRestrictions::ScopedAllowWait allow_wait;
   request.event.Wait();
   return request.result;
 }
 
+scoped_refptr<base::SingleThreadTaskRunner>
+BrowserGpuChannelHostFactory::TaskRunner() {
+#if defined(OS_MACOSX) || defined(OS_WIN)
+  // If we're adding a route to the main UI thread, we need to use the
+  // WindowResizeHelper's task runner, otherwise Gpu Channel messages will be
+  // blocked during a resize and we won't recieve the swap complete signal.
+  return ui::WindowResizeHelper::Get()->task_runner();
+#else
+  return base::ThreadTaskRunnerHandle::Get();
+#endif
+}
+
 // Blocking the UI thread to open a GPU channel is not supported on Android.
 // (Opening the initial channel to a child process involves handling a reply
 // task on the UI thread first, so we cannot block here.)
 #if !defined(OS_ANDROID)
 GpuChannelHost* BrowserGpuChannelHostFactory::EstablishGpuChannelSync(
     CauseForGpuLaunch cause_for_gpu_launch) {
   EstablishGpuChannel(cause_for_gpu_launch, base::Closure());
 
   if (pending_request_.get())
     pending_request_->Wait();
@@ skipping 79 matching lines @@
 }
 
 // static
 void BrowserGpuChannelHostFactory::InitializeShaderDiskCacheOnIO(
     int gpu_client_id,
     const base::FilePath& cache_dir) {
   ShaderCacheFactory::GetInstance()->SetCacheInfo(gpu_client_id, cache_dir);
 }
 
 }  // namespace content