Switch the inheritance of WebViewClient from WebWidgetClient to protected.

third_party/WebKit/Source/web/tests/TopControlsTest.cpp

 /*
  * Copyright (C) 2015 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 60 matching lines @@
         Platform::current()->getURLLoaderMockFactory()->unregisterAllURLs();
         WebCache::clear();
     }
 
     WebViewImpl* initialize(const std::string& pageName = "large-div.html")
     {
         RuntimeEnabledFeatures::setInertTopControlsEnabled(true);
 
         // Load a page with large body and set viewport size to 400x400 to ensure
         // main frame is scrollable.
-        m_helper.initializeAndLoad(m_baseURL + pageName, true, 0, 0, &configureSettings);
+        m_helper.initializeAndLoad(m_baseURL + pageName, true, nullptr, nullptr, nullptr, &configureSettings);
 
         webViewImpl()->resize(IntSize(400, 400));
         return webViewImpl();
     }
 
     static void configureSettings(WebSettings* settings)
     {
         settings->setJavaScriptEnabled(true);
         settings->setAcceleratedCompositingEnabled(true);
         settings->setPreferCompositingToLCDTextEnabled(true);
@@ skipping 718 matching lines @@
 
         ASSERT_EQ(80.f, webView->topControls().contentOffset());
         EXPECT_EQ(expectedRootOffset, rootViewport->scrollPosition().y());
 
         webView->handleInputEvent(
             generateEvent(WebInputEvent::GestureScrollEnd));
     }
 }
 
 } // namespace blink