Simplify tests by using Web*Impl types directly.

third_party/WebKit/Source/web/tests/ScrollingCoordinatorTest.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:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 80 matching lines @@
     WebLayer* getRootScrollLayer()
     {
         PaintLayerCompositor* compositor = frame()->contentLayoutItem().compositor();
         DCHECK(compositor);
         DCHECK(compositor->scrollLayer());
 
         WebLayer* webScrollLayer = compositor->scrollLayer()->platformLayer();
         return webScrollLayer;
     }
 
-    WebViewImpl* webViewImpl() const { return m_helper.webViewImpl(); }
-    LocalFrame* frame() const { return m_helper.webViewImpl()->mainFrameImpl()->frame(); }
+    WebViewImpl* webViewImpl() const { return m_helper.webView(); }
+    LocalFrame* frame() const { return m_helper.webView()->mainFrameImpl()->frame(); }
 
     WebLayerTreeView* webLayerTreeView() const { return webViewImpl()->layerTreeView(); }
 
 protected:
     std::string m_baseURL;
     FrameTestHelpers::TestWebViewClient m_mockWebViewClient;
 
 private:
     static void configureSettings(WebSettings* settings)
     {
@@ skipping 564 matching lines @@
     // remove custom scrollbar class, the scrollbar is expected to scroll on
     // impl thread as it is an overlay scrollbar.
     container->removeAttribute("class");
     forceFullCompositingUpdate();
     scrollbarGraphicsLayer = compositedLayerMapping->layerForVerticalScrollbar();
     ASSERT_FALSE(scrollbarGraphicsLayer->platformLayer()->shouldScrollOnMainThread());
     ASSERT_FALSE(scrollbarGraphicsLayer->platformLayer()->mainThreadScrollingReasons() & MainThreadScrollingReason::kCustomScrollbarScrolling);
 }
 
 } // namespace blink