Remove the last references from production code to WebViewImpl.

third_party/WebKit/Source/web/ChromeClientImpl.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  *
  * 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.
@@ skipping 366 matching lines @@
     return nullptr;
 
   if (!frame->GetPage() || frame->GetPage()->Suspended())
     return nullptr;
 
   WebNavigationPolicy policy =
       EffectiveNavigationPolicy(navigation_policy, features);
   DCHECK(frame->GetDocument());
   Fullscreen::FullyExitFullscreen(*frame->GetDocument());
 
-  WebViewImpl* new_view = ToWebViewImpl(web_view_->Client()->CreateView(
-      WebLocalFrameImpl::FromFrame(frame),
-      WrappedResourceRequest(r.GetResourceRequest()), features, r.FrameName(),
-      policy, r.GetShouldSetOpener() == kNeverSetOpener || features.noopener));
+  WebViewBase* new_view =
+      static_cast<WebViewBase*>(web_view_->Client()->CreateView(
+          WebLocalFrameImpl::FromFrame(frame),
+          WrappedResourceRequest(r.GetResourceRequest()), features,
+          r.FrameName(), policy,
+          r.GetShouldSetOpener() == kNeverSetOpener || features.noopener));
   if (!new_view)
     return nullptr;
   return new_view->GetPage();
 }
 
 void ChromeClientImpl::DidOverscroll(const FloatSize& overscroll_delta,
                                      const FloatSize& accumulated_overscroll,
                                      const FloatPoint& position_in_viewport,
                                      const FloatSize& velocity_in_viewport) {
   if (!web_view_->Client())
@@ skipping 838 matching lines @@
   if (RuntimeEnabledFeatures::presentationEnabled())
     PresentationController::ProvideTo(frame, client->PresentationClient());
   if (RuntimeEnabledFeatures::audioOutputDevicesEnabled()) {
     ProvideAudioOutputDeviceClientTo(frame,
                                      new AudioOutputDeviceClientImpl(frame));
   }
   InstalledAppController::ProvideTo(frame, client->GetRelatedAppsFetcher());
 }
 
 }  // namespace blink