cc: Remove forbidden using namespace directives.

cc/layer_tree_host_common_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 "config.h"
 
 #include "cc/layer_tree_host_common.h"
 
 #include "cc/content_layer.h"
 #include "cc/content_layer_client.h"
 #include "cc/layer.h"
 #include "cc/layer_animation_controller.h"
 #include "cc/layer_impl.h"
 #include "cc/layer_sorter.h"
 #include "cc/math_util.h"
 #include "cc/proxy.h"
 #include "cc/single_thread_proxy.h"
 #include "cc/test/animation_test_common.h"
 #include "cc/test/geometry_test_utils.h"
 #include "cc/thread.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include <public/WebTransformationMatrix.h>
 
-using namespace cc;
 using namespace WebKitTests;
 using WebKit::WebTransformationMatrix;
 
+namespace cc {
 namespace {
 
 template<typename LayerType>
 void setLayerPropertiesForTestingInternal(LayerType* layer, const WebTransformationMatrix& transform, const WebTransformationMatrix& sublayerTransform, const gfx::PointF& anchor, const gfx::PointF& position, const gfx::Size& bounds, bool preserves3D)
 {
     layer->setTransform(transform);
     layer->setSublayerTransform(sublayerTransform);
     layer->setAnchorPoint(anchor);
     layer->setPosition(position);
     layer->setBounds(bounds);
@@ skipping 3999 matching lines @@
 
     int nonexistentId = -1;
     EXPECT_EQ(root, LayerTreeHostCommon::findLayerInSubtree(root.get(), root->id()));
     EXPECT_EQ(child, LayerTreeHostCommon::findLayerInSubtree(root.get(), child->id()));
     EXPECT_EQ(grandChild, LayerTreeHostCommon::findLayerInSubtree(root.get(), grandChild->id()));
     EXPECT_EQ(maskLayer, LayerTreeHostCommon::findLayerInSubtree(root.get(), maskLayer->id()));
     EXPECT_EQ(replicaLayer, LayerTreeHostCommon::findLayerInSubtree(root.get(), replicaLayer->id()));
     EXPECT_EQ(0, LayerTreeHostCommon::findLayerInSubtree(root.get(), nonexistentId));
 }
 
-}  // anonymous namespace
+}  // namespace
+}  // namespace cc