cc: Remove forbidden using namespace directives.

cc/solid_color_layer_impl_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/solid_color_layer_impl.h"
 
 #include "cc/append_quads_data.h"
 #include "cc/single_thread_proxy.h"
 #include "cc/solid_color_draw_quad.h"
 #include "cc/solid_color_layer.h"
 #include "cc/test/layer_test_common.h"
 #include "cc/test/mock_quad_culler.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
-using namespace cc;
 using namespace LayerTestCommon;
 
+namespace cc {
 namespace {
 
 TEST(SolidColorLayerImplTest, verifyTilingCompleteAndNoOverlap)
 {
     MockQuadCuller quadCuller;
     gfx::Size layerSize = gfx::Size(800, 600);
     gfx::Rect visibleContentRect = gfx::Rect(gfx::Point(), layerSize);
 
     scoped_ptr<SolidColorLayerImpl> layer = SolidColorLayerImpl::create(1);
     layer->setVisibleContentRect(visibleContentRect);
@@ skipping 103 matching lines @@
 
         MockQuadCuller quadCuller;
         AppendQuadsData data;
         layerImpl->appendQuads(quadCuller, data);
 
         ASSERT_EQ(quadCuller.quadList().size(), 1U);
         EXPECT_EQ(gfx::Rect().ToString(), quadCuller.quadList()[0]->opaqueRect().ToString());
     }
 }
 
-}  // anonymous namespace
+}  // namespace
+}  // namespace cc