| Index: content/browser/renderer_host/render_widget_host_view_aura.cc | 
| =================================================================== | 
| --- content/browser/renderer_host/render_widget_host_view_aura.cc	(revision 248504) | 
| +++ content/browser/renderer_host/render_widget_host_view_aura.cc	(working copy) | 
| @@ -1337,15 +1337,16 @@ | 
| #if defined(OS_WIN) | 
| void RenderWidgetHostViewAura::UpdateConstrainedWindowRects( | 
| const std::vector<gfx::Rect>& rects) { | 
| +  // Check this before setting constrained_rects_, so that next time they're set | 
| +  // and we have a root window we don't early return. | 
| +  if (!window_->GetDispatcher()) | 
| +    return; | 
| + | 
| if (rects == constrained_rects_) | 
| return; | 
| + | 
| constrained_rects_ = rects; | 
| -  UpdateCutoutRects(); | 
| -} | 
|  | 
| -void RenderWidgetHostViewAura::UpdateCutoutRects() { | 
| -  if (!window_->GetRootWindow()) | 
| -    return; | 
| HWND parent = window_->GetDispatcher()->host()->GetAcceleratedWidget(); | 
| CutoutRectsParams params; | 
| params.widget = this; | 
|  |