Introduce the abstract class WebViewBase, to decouple WebViewImpl.

third_party/WebKit/Source/web/PrerendererClientImpl.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 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  */
 
 #include "web/PrerendererClientImpl.h"
 
+#include "core/exported/WebViewBase.h"
 #include "platform/Prerender.h"
 #include "public/platform/WebPrerender.h"
 #include "public/web/WebPrerendererClient.h"
-#include "web/WebViewImpl.h"
 
 namespace blink {
 
 PrerendererClientImpl::PrerendererClientImpl(Page& page,
                                              WebPrerendererClient* client)
     : PrerendererClient(page), client_(client) {}
 
 void PrerendererClientImpl::WillAddPrerender(Prerender* prerender) {
   if (!client_)
     return;
   WebPrerender web_prerender(prerender);
   client_->WillAddPrerender(&web_prerender);
 }
 
 bool PrerendererClientImpl::IsPrefetchOnly() {
   return client_ && client_->IsPrefetchOnly();
 }
 
 }  // namespace blink