Introduce the abstract class WebViewBase, to decouple WebViewImpl.

third_party/WebKit/Source/web/DateTimeChooserImpl.cpp

 /*
  * Copyright (C) 2012 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 22 matching lines @@
 #include "core/InputTypeNames.h"
 #include "core/frame/FrameView.h"
 #include "core/html/forms/DateTimeChooserClient.h"
 #include "core/layout/LayoutTheme.h"
 #include "core/page/PagePopup.h"
 #include "platform/DateComponents.h"
 #include "platform/Language.h"
 #include "platform/text/PlatformLocale.h"
 #include "public/platform/Platform.h"
 #include "web/ChromeClientImpl.h"
-#include "web/WebViewImpl.h"
 
 namespace blink {
 
 DateTimeChooserImpl::DateTimeChooserImpl(
     ChromeClientImpl* chrome_client,
     DateTimeChooserClient* client,
     const DateTimeChooserParameters& parameters)
     : chrome_client_(chrome_client),
       client_(client),
       popup_(0),
@@ skipping 184 matching lines @@
   EndChooser();
 }
 
 void DateTimeChooserImpl::DidClosePopup() {
   DCHECK(client_);
   popup_ = nullptr;
   client_->DidEndChooser();
 }
 
 }  // namespace blink