cc: Unify namespaces for all test files

cc/test/fake_content_layer_client.cc

 // 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 "cc/test/fake_content_layer_client.h"
 
 #include "ui/gfx/rect.h"
 
-namespace WebKitTests {
+namespace cc {
 
 FakeContentLayerClient::FakeContentLayerClient()
     : m_paintAllOpaque(false)
 {
 }
 
 void FakeContentLayerClient::paintContents(SkCanvas*, const gfx::Rect& rect, gfx::RectF& opaqueRect)
 {
   if (m_paintAllOpaque)
     opaqueRect = rect;
 }
 
-}  // namespace WebKitTests
+}  // namespace cc