cc: Remove forbidden using namespace directives.

cc/scrollbar_animation_controller_linear_fade_unittest.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 "config.h"
 
 #include "cc/scrollbar_animation_controller_linear_fade.h"
 
 #include "cc/scrollbar_layer_impl.h"
 #include "cc/single_thread_proxy.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
-using namespace cc;
-
+namespace cc {
 namespace {
 
 class ScrollbarAnimationControllerLinearFadeTest : public testing::Test {
 protected:
     virtual void SetUp()
     {
         m_scrollLayer = LayerImpl::create(1);
         m_scrollLayer->addChild(LayerImpl::create(2));
         m_contentLayer = m_scrollLayer->children()[0];
         m_scrollbarLayer = ScrollbarLayerImpl::create(3);
@@ skipping 82 matching lines @@
     EXPECT_FLOAT_EQ(1, m_scrollbarLayer->opacity());
     m_scrollbarController->animate(9);
     EXPECT_FLOAT_EQ(2 / 3.0f, m_scrollbarLayer->opacity());
     m_scrollbarController->animate(10);
     EXPECT_FLOAT_EQ(1 / 3.0f, m_scrollbarLayer->opacity());
     m_scrollbarController->animate(11);
     EXPECT_FLOAT_EQ(0, m_scrollbarLayer->opacity());
 
 }
 
-}  // annoymous namespace
+}  // namespace
+}  // namespace cc