Add supportsInputMethod() interface for WebPlugin.

Source/web/WebPluginContainerImpl.h

 /*
  * Copyright (C) 2009 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 59 matching lines @@
     static PassRefPtr<WebPluginContainerImpl> create(WebCore::HTMLPlugInElement* element, WebPlugin* webPlugin)
     {
         return adoptRef(new WebPluginContainerImpl(element, webPlugin));
     }
 
     // PluginView methods
     virtual WebLayer* platformLayer() const OVERRIDE;
     virtual NPObject* scriptableObject() OVERRIDE;
     virtual bool getFormValue(String&) OVERRIDE;
     virtual bool supportsKeyboardFocus() const OVERRIDE;
+    virtual bool supportsInputMethod() const OVERRIDE;
     virtual bool canProcessDrag() const OVERRIDE;
     virtual bool wantsWheelEvents() OVERRIDE;
 
     // Widget methods
     virtual void setFrameRect(const WebCore::IntRect&);
     virtual void paint(WebCore::GraphicsContext*, const WebCore::IntRect&);
     virtual void invalidateRect(const WebCore::IntRect&);
     virtual void setFocus(bool);
     virtual void show();
     virtual void hide();
@@ skipping 122 matching lines @@
     // WebPluginContainerImpl is the only subclass of WebPluginContainer.
     return static_cast<WebPluginContainerImpl*>(container);
 }
 
 // This will catch anyone doing an unnecessary cast.
 void toPluginContainerImpl(const WebPluginContainerImpl*);
 
 } // namespace blink
 
 #endif