cc: Remove forbidden using namespace directives.

cc/render_pass_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/render_pass.h"
 
 #include "cc/checkerboard_draw_quad.h"
 #include "cc/test/geometry_test_utils.h"
 #include "cc/test/render_pass_test_common.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/effects/SkBlurImageFilter.h"
 #include <public/WebFilterOperations.h>
 #include <public/WebTransformationMatrix.h>
 
 using WebKit::WebFilterOperation;
 using WebKit::WebFilterOperations;
 using WebKit::WebTransformationMatrix;
 using WebKitTests::TestRenderPass;
 
-using namespace cc;
-
+namespace cc {
 namespace {
 
 struct RenderPassSize {
     // If you add a new field to this class, make sure to add it to the copy() tests.
     RenderPass::Id m_id;
     QuadList m_quadList;
     SharedQuadStateList m_sharedQuadStateList;
     WebKit::WebTransformationMatrix m_transformToRootTarget;
     gfx::Rect m_outputRect;
     gfx::RectF m_damageRect;
@@ skipping 43 matching lines @@
     EXPECT_EQ(pass->hasTransparentBackground(), copy->hasTransparentBackground());
     EXPECT_EQ(pass->hasOcclusionFromOutsideTargetSurface(), copy->hasOcclusionFromOutsideTargetSurface());
     EXPECT_EQ(pass->filters(), copy->filters());
     EXPECT_EQ(pass->backgroundFilters(), copy->backgroundFilters());
     EXPECT_EQ(pass->filter(), copy->filter());
     EXPECT_EQ(0u, copy->quadList().size());
 
     EXPECT_EQ(sizeof(RenderPassSize), sizeof(RenderPass));
 }
 
-}  // anonymous namespace
+}  // namespace
+}  // namespace cc