Change cc files from namespace WebCore to cc

cc/CCHeadsUpDisplayTest.cpp

 // Copyright 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 "config.h"
 
 #include "CCLayerTreeHost.h"
 #include "CCThreadedTest.h"
 #include "HeadsUpDisplayLayerChromium.h"
 #include "LayerChromium.h"
 
-using namespace WebCore;
+using namespace cc;
 using namespace WebKitTests;
 
 namespace {
 
 class CCHeadsUpDisplayTest : public CCThreadedTest {
 protected:
     virtual void initializeSettings(CCLayerTreeSettings& settings) OVERRIDE
     {
         // Enable the HUD without requiring text.
         settings.showPropertyChangedRects = true;
@@ skipping 78 matching lines @@
     RefPtr<DrawsContentLayerChromium> m_rootLayer2;
     int m_numCommits;
 };
 
 TEST_F(CCHudWithRootLayerChange, runMultiThread)
 {
     runTest(true);
 }
 
 } // namespace