Use inner HWND for accelerated rendering on windows

chrome/renderer/render_widget.cc

 // Copyright (c) 2010 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 "chrome/renderer/render_widget.h"
 
 #include "app/surface/transport_dib.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
@@ skipping 636 matching lines @@
 
   // Perform updating asynchronously.  This serves two purposes:
   // 1) Ensures that we call WebView::Paint without a bunch of other junk
   //    on the call stack.
   // 2) Allows us to collect more damage rects before painting to help coalesce
   //    the work that we will need to do.
   MessageLoop::current()->PostTask(FROM_HERE, NewRunnableMethod(
       this, &RenderWidget::CallDoDeferredUpdate));
 }
 
+void RenderWidget::didChangeAcceleratedCompositingActive(bool active) {
+#if defined(OS_WIN)
+  Send(new ViewHostMsg_ShowCompositorHostWindow(routing_id_, active));
+#endif
+}
+
 void RenderWidget::scheduleComposite() {
   // TODO(nduca): replace with something a little less hacky.  The reason this
   // hack is still used is because the Invalidate-DoDeferredUpdate loop
   // contains a lot of host-renderer synchronization logic that is still
   // important for the accelerated compositing case. The option of simply
   // duplicating all that code is less desirable than "faking out" the
   // invalidation path using a magical damage rect.
   didInvalidateRect(WebRect(0,0,1,1));
 }
 
@@ skipping 336 matching lines @@
 
 void RenderWidget::CleanupWindowInPluginMoves(gfx::PluginWindowHandle window) {
   for (WebPluginGeometryVector::iterator i = plugin_window_moves_.begin();
        i != plugin_window_moves_.end(); ++i) {
     if (i->window == window) {
       plugin_window_moves_.erase(i);
       break;
     }
   }
 }