Move the logic to retrieve the WebPluginContainer to LocalFrame and Node.

third_party/WebKit/Source/core/plugins/PluginView.h

Index: third_party/WebKit/Source/core/plugins/PluginView.h
diff --git a/third_party/WebKit/Source/core/plugins/PluginView.h b/third_party/WebKit/Source/core/plugins/PluginView.h
index 7f538e56a62fc98dc287433b373adba8fb949efd..bd8cf042b170eeca6624a586e03be0ec963dfd8e 100644
--- a/third_party/WebKit/Source/core/plugins/PluginView.h
+++ b/third_party/WebKit/Source/core/plugins/PluginView.h
@@ -41,6 +41,7 @@ namespace blink {
 class Event;
 class ResourceResponse;
 class WebLayer;
+class WebPluginContainerBase;
 
 // TODO(joelhockey): Remove this class.
 // The only implementation of this class is web/WebPluginContainerImpl.
@@ -72,6 +73,9 @@ class CORE_EXPORT PluginView : public FrameOrPlugin {
 
   virtual void UpdateAllLifecyclePhases() {}
   virtual void InvalidatePaint() {}
+  virtual WebPluginContainerBase* GetWebPluginContainerBase() const {
+    return nullptr;
+  }
 };
 
 DEFINE_TYPE_CASTS(PluginView,