Set GPU rasterization trigger for OOPIFs

third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp

 /*
  * Copyright (C) 2014 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 1029 matching lines @@
         layer_tree_view_->CompositorAnimationHost());
   }
 
   if (WebDevToolsAgentImpl* dev_tools = local_root_->DevToolsAgentImpl())
     dev_tools->LayerTreeViewChanged(layer_tree_view_);
 
   GetPage()->GetSettings().SetAcceleratedCompositingEnabled(layer_tree_view_);
   if (layer_tree_view_) {
     GetPage()->LayerTreeViewInitialized(*layer_tree_view_,
                                         local_root_->GetFrame()->View());
+
+    // TODO(kenrb): Currently GPU rasterization is always enabled for OOPIFs.
+    // This is okay because it is only necessarily to set the trigger to false
+    // for certain cases that affect the top-level frame, but it would be better
+    // to be consistent with the top-level frame. Ideally the logic should
+    // be moved from WebViewImpl into WebFrameWidget and used for all local
+    // frame roots. https://crbug.com/712794
+    layer_tree_view_->HeuristicsForGpuRasterizationUpdated(true);
   }
 
   // FIXME: only unittests, click to play, Android priting, and printing (for
   // headers and footers) make this assert necessary. We should make them not
   // hit this code and then delete allowsBrokenNullLayerTreeView.
   DCHECK(layer_tree_view_ || client_->AllowsBrokenNullLayerTreeView());
 }
 
 void WebFrameWidgetImpl::SetIsAcceleratedCompositingActive(bool active) {
   // In the middle of shutting down; don't try to spin back up a compositor.
@@ skipping 118 matching lines @@
   return nullptr;
 }
 
 LocalFrame* WebFrameWidgetImpl::FocusedLocalFrameAvailableForIme() const {
   if (!ime_accept_events_)
     return nullptr;
   return FocusedLocalFrameInWidget();
 }
 
 }  // namespace blink