Get rid of WebLayerTreeViewClient references in WebLayerTreeViewImplForTesting

webkit/support/test_webkit_platform_support.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "webkit/support/test_webkit_platform_support.h"
 
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/memory/scoped_handle.h"
@@ skipping 587 matching lines @@
 
 WebKit::WebString TestWebKitPlatformSupport::webKitRootDir() {
   return webkit_support::GetWebKitRootDir();
 }
 
 
 WebKit::WebLayerTreeView*
     TestWebKitPlatformSupport::createLayerTreeViewForTesting() {
   scoped_ptr<WebLayerTreeViewImplForTesting> view(
       new WebLayerTreeViewImplForTesting(
-          WebLayerTreeViewImplForTesting::FAKE_CONTEXT,
-          static_cast<WebKit::WebLayerTreeViewClient*>(NULL)));
+          WebLayerTreeViewImplForTesting::FAKE_CONTEXT, NULL));
 
   if (!view->initialize(scoped_ptr<cc::Thread>()))
     return NULL;
   return view.release();
 }
 
 WebKit::WebLayerTreeView*
     TestWebKitPlatformSupport::createLayerTreeViewForTesting(
         TestViewType type) {
   DCHECK_EQ(TestViewTypeUnitTest, type);
   return createLayerTreeViewForTesting();
 }