cc: Unify namespaces for all test files

cc/frame_rate_controller_unittest.cc

 // Copyright 2011 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/frame_rate_controller.h"
 
 #include "cc/test/scheduler_test_common.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
-using namespace WebKitTests;
-
 namespace cc {
 namespace {
 
 class FakeFrameRateControllerClient : public cc::FrameRateControllerClient {
 public:
     FakeFrameRateControllerClient() { reset(); }
 
     void reset() { m_vsyncTicked = false; }
     bool vsyncTicked() const { return m_vsyncTicked; }
 
@@ skipping 138 matching lines @@
     EXPECT_FALSE(thread.hasPendingTask());
 
     // didFinishFrame triggers a frame, make sure the vsync callback is called
     controller.didFinishFrame();
     thread.runPendingTask();
     EXPECT_TRUE(client.vsyncTicked());
 }
 
 }  // namespace
 }  // namespace cc