Implement Mac Pop-up Dictionary for OOPIF.

content/renderer/render_view_impl.h

Index: content/renderer/render_view_impl.h
diff --git a/content/renderer/render_view_impl.h b/content/renderer/render_view_impl.h
index 4d6d527c61f68a2ccb91a933eb4e233f1b8b5f85..7abcce050929bbfb6b8b3ac2ca812af125f2b170 100644
--- a/content/renderer/render_view_impl.h
+++ b/content/renderer/render_view_impl.h
@@ -240,15 +240,6 @@ class CONTENT_EXPORT RenderViewImpl
   void AttachWebFrameWidget(blink::WebFrameWidget* frame_widget);
 
   // Plugin-related functions --------------------------------------------------
-
-#if defined(ENABLE_PLUGINS)
-  // TODO(ekaramad): This method is only used by TextInputClientObserver.
-  // Ideally, TextInputClientObserver should use RenderFrame/RenderWidget to
-  // obtain the plugin. Come back to this later when implementing IME for Mac
-  // to see if we can remove this API (https://crbug.com/578168).
-  PepperPluginInstanceImpl* GetFocusedPepperPlugin();
-#endif  // ENABLE_PLUGINS
-
   void TransferActiveWheelFlingAnimation(
       const blink::WebActiveWheelFlingParameters& params);