Change cc files from namespace WebCore to cc

cc/stubs/Extensions3D.h

 // 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.
 
 #ifndef CC_STUBS_EXTENSIONS3D_H_
 #define CC_STUBS_EXTENSIONS3D_H_
 
 #include "third_party/khronos/GLES2/gl2.h"
 #include "third_party/khronos/GLES2/gl2ext.h"
 
-namespace WebCore {
+namespace cc {
 
 class Extensions3D {
 public:
     enum {
         TEXTURE_RECTANGLE_ARB = GL_TEXTURE_RECTANGLE_ARB,
         BGRA_EXT = GL_BGRA_EXT,
         RGBA8_OES = GL_RGBA8_OES,
     };
 };
 
 }
 
 
 #endif  // CC_STUBS_EXTENSIONS3D_H_
-