Use inner HWND for accelerated rendering on windows

chrome/browser/renderer_host/render_widget_host_view_mac.mm

Index: chrome/browser/renderer_host/render_widget_host_view_mac.mm
===================================================================
--- chrome/browser/renderer_host/render_widget_host_view_mac.mm	(revision 66779)
+++ chrome/browser/renderer_host/render_widget_host_view_mac.mm	(working copy)
@@ -690,7 +690,7 @@
   if (!is_hidden_) {
     std::vector<gfx::Rect> rects(copy_rects);
 
-    // Because the findbar might be open, we cannot use scrollRect:by: here.  For
+    // Because the findbar might be open, we cannot use scrollRect:by: here. For
     // now, simply mark all of scroll rect as dirty.
     if (!scroll_rect.IsEmpty())
       rects.push_back(scroll_rect);
@@ -950,8 +950,8 @@
   // Plugins are destroyed on page navigate. The compositor layer on the other
   // hand is created on demand and then stays alive until its renderer process
   // dies (usually on cross-domain navigation). Instead, only a flag
-  // |is_gpu_rendering_active()| is flipped when the compositor output should be
-  // shown/hidden.
+  // |is_accelerated_compositing_active()| is flipped when the compositor output
+  // should be shown/hidden.
   // Show/hide the view belonging to the compositor here.
   plugin_container_manager_.set_gpu_rendering_active(show_gpu_widget);
 
@@ -979,9 +979,9 @@
 
 void RenderWidgetHostViewMac::GpuRenderingStateDidChange() {
   CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  if (GetRenderWidgetHost()->is_gpu_rendering_active()) {
+  if (GetRenderWidgetHost()->is_accelerated_compositing_active()) {
     UpdateRootGpuViewVisibility(
-        GetRenderWidgetHost()->is_gpu_rendering_active());
+        GetRenderWidgetHost()->is_accelerated_compositing_active());
   } else {
     needs_gpu_visibility_update_after_repaint_ = true;
   }
@@ -1579,7 +1579,8 @@
 
   const gfx::Rect damagedRect([self flipNSRectToRect:dirtyRect]);
 
-  if (renderWidgetHostView_->render_widget_host_->is_gpu_rendering_active()) {
+  if (renderWidgetHostView_->render_widget_host_->
+      is_accelerated_compositing_active()) {
     gfx::Rect gpuRect;
 
     gfx::PluginWindowHandle root_handle =