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

third_party/WebKit/Source/web/WebViewImpl.h

 /*
  * Copyright (C) 2010 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 72 matching lines @@
 class PaintLayerCompositor;
 class UserGestureToken;
 class WebActiveGestureAnimation;
 class WebDevToolsAgentImpl;
 class WebElement;
 class WebInputMethodControllerImpl;
 class WebLayerTreeView;
 class WebLocalFrame;
 class WebLocalFrameImpl;
 class CompositorMutatorImpl;
-class WebPlugin;
 class WebRemoteFrame;
 class WebSettingsImpl;
 class WebViewScheduler;
 
 class WEB_EXPORT WebViewImpl final
     : NON_EXPORTED_BASE(public WebViewBase),
       NON_EXPORTED_BASE(public WebGestureCurveTarget),
       public PageWidgetEventHandler,
       public WebScheduler::InterventionReporter,
       public WebViewScheduler::WebViewSchedulerSettings {
@@ skipping 469 matching lines @@
   void HandleMouseUp(LocalFrame&, const WebMouseEvent&) override;
   WebInputEventResult HandleMouseWheel(LocalFrame&,
                                        const WebMouseWheelEvent&) override;
   WebInputEventResult HandleGestureEvent(const WebGestureEvent&) override;
   WebInputEventResult HandleKeyEvent(const WebKeyboardEvent&) override;
   WebInputEventResult HandleCharEvent(const WebKeyboardEvent&) override;
 
   WebInputEventResult HandleSyntheticWheelFromTouchpadPinchEvent(
       const WebGestureEvent&);
 
-  WebPlugin* FocusedPluginIfInputMethodSupported(LocalFrame*);
-
   WebGestureEvent CreateGestureScrollEventFromFling(WebInputEvent::Type,
                                                     WebGestureDevice) const;
 
   void EnablePopupMouseWheelEventListener(WebLocalFrameImpl* local_root);
   void DisablePopupMouseWheelEventListener();
 
   void CancelPagePopup();
   void UpdatePageOverlays();
 
   float DeviceScaleFactor() const;
@@ skipping 151 matching lines @@
   Persistent<ResizeViewportAnchor> resize_viewport_anchor_;
 };
 
 // We have no ways to check if the specified WebView is an instance of
 // WebViewImpl because WebViewImpl is the only implementation of WebView.
 DEFINE_TYPE_CASTS(WebViewImpl, WebView, webView, true, true);
 
 }  // namespace blink
 
 #endif