Introduce WebPluginContainerBase to abstract WebPluginContainerImpl.

third_party/WebKit/Source/web/WebInputMethodControllerImpl.cpp

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "web/WebInputMethodControllerImpl.h"
 
 #include "core/InputTypeNames.h"
 #include "core/dom/DocumentUserGestureToken.h"
 #include "core/editing/CompositionUnderlineVectorBuilder.h"
 #include "core/editing/EditingUtilities.h"
 #include "core/editing/Editor.h"
 #include "core/editing/EphemeralRange.h"
 #include "core/editing/FrameSelection.h"
 #include "core/editing/InputMethodController.h"
 #include "core/editing/PlainTextRange.h"
+#include "core/exported/WebPluginContainerBase.h"
 #include "core/frame/LocalFrame.h"
 #include "core/page/FocusController.h"
 #include "core/page/Page.h"
 #include "platform/UserGestureIndicator.h"
 #include "public/platform/WebString.h"
 #include "public/web/WebPlugin.h"
 #include "public/web/WebRange.h"
 #include "web/WebLocalFrameImpl.h"
-#include "web/WebPluginContainerImpl.h"
 
 namespace blink {
 
 WebInputMethodControllerImpl::WebInputMethodControllerImpl(
     WebLocalFrameImpl* web_local_frame)
     : web_local_frame_(web_local_frame) {}
 
 WebInputMethodControllerImpl::~WebInputMethodControllerImpl() {}
 
 // static
@@ skipping 116 matching lines @@
   return web_local_frame_->GetFrame();
 }
 
 InputMethodController& WebInputMethodControllerImpl::GetInputMethodController()
     const {
   return GetFrame()->GetInputMethodController();
 }
 
 WebPlugin* WebInputMethodControllerImpl::FocusedPluginIfInputMethodSupported()
     const {
-  WebPluginContainerImpl* container =
+  WebPluginContainerBase* container =
       WebLocalFrameImpl::CurrentPluginContainer(GetFrame());
   if (container && container->SupportsInputMethod())
     return container->Plugin();
   return nullptr;
 }
 
 }  // namespace blink