Use inner HWND for accelerated rendering on windows

chrome/browser/gpu_process_host.cc

Index: chrome/browser/gpu_process_host.cc
===================================================================
--- chrome/browser/gpu_process_host.cc	(revision 65702)
+++ chrome/browser/gpu_process_host.cc	(working copy)
@@ -194,6 +194,10 @@
                         OnAcceleratedSurfaceSetIOSurface)
     IPC_MESSAGE_HANDLER(GpuHostMsg_AcceleratedSurfaceBuffersSwapped,
                         OnAcceleratedSurfaceBuffersSwapped)
+#elif defined(OS_WIN)
+    IPC_MESSAGE_HANDLER_DELAY_REPLY(GpuHostMsg_CreateCompositorHostWindow,
+                                    OnCreateCompositorHostWindow)
+    IPC_MESSAGE_HANDLER(GpuHostMsg_ScheduleComposite, OnScheduleComposite)
 #endif
     IPC_MESSAGE_UNHANDLED_ERROR()
   IPC_END_MESSAGE_MAP()
@@ -342,6 +346,52 @@
       new BuffersSwappedDispatcher(
           renderer_id, render_view_id, window, surface_id));
 }
+
+#elif defined(OS_WIN)
+
+namespace {
+
+void CreateCompositorHostWindowDispatcher(
+    int32 renderer_id,
+    int32 render_view_id,
+    IPC::Message* reply_msg) {
+  RenderViewHost* host = RenderViewHost::FromID(renderer_id,
+                                                render_view_id);
+
+  RenderWidgetHostView* view = host->view();
+  gfx::PluginWindowHandle id = view->CreateCompositorHostWindow();
+
+  GpuHostMsg_CreateCompositorHostWindow::WriteReplyParams(reply_msg, id);
+
+  host->Send(reply_msg);
+}
+
+void ScheduleCompositeDispatcher(int32 renderer_id, int32 render_view_id) {
+  RenderViewHost* host = RenderViewHost::FromID(renderer_id,
+                                                render_view_id);
+  DCHECK(host);
+
+
+  host->ScheduleComposite();
+}
+}  // namespace
+
+void GpuProcessHost::OnCreateCompositorHostWindow(
+    int32 renderer_id,
+    int32 render_view_id,
+    IPC::Message* reply_message) {
+  BrowserThread::PostTask(
+      BrowserThread::UI, FROM_HERE,
+      NewRunnableFunction(&CreateCompositorHostWindowDispatcher,
+          renderer_id, render_view_id, reply_message));
+}
+
+void GpuProcessHost::OnScheduleComposite(int renderer_id, int render_view_id) {
+  BrowserThread::PostTask(
+      BrowserThread::UI, FROM_HERE,
+      NewRunnableFunction(&ScheduleCompositeDispatcher,
+          renderer_id, render_view_id));
+}
 #endif
 
 void GpuProcessHost::ReplyToRenderer(