cc: Remove forbidden using namespace directives.

cc/nine_patch_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/nine_patch_layer_impl.h"
 
 #include "cc/append_quads_data.h"
 #include "cc/single_thread_proxy.h"
 #include "cc/test/geometry_test_utils.h"
 #include "cc/test/layer_test_common.h"
 #include "cc/test/mock_quad_culler.h"
 #include "cc/texture_draw_quad.h"
 #include "ui/gfx/rect_conversions.h"
 #include "ui/gfx/safe_integer_conversions.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include <public/WebTransformationMatrix.h>
 
-using namespace cc;
-
+namespace cc {
 namespace {
 
 gfx::Rect ToRoundedIntRect(gfx::RectF rect_f) {
     return gfx::Rect(gfx::ToRoundedInt(rect_f.x()), gfx::ToRoundedInt(rect_f.y()), gfx::ToRoundedInt(rect_f.width()), gfx::ToRoundedInt(rect_f.height()));
 }
 
 TEST(NinePatchLayerImplTest, verifyDrawQuads)
 {
     // Input is a 100x100 bitmap with a 40x50 aperture at x=20, y=30.
     // The bounds of the layer are set to 400x400, so the draw quads
@@ skipping 49 matching lines @@
         TextureDrawQuad* texQuad = static_cast<TextureDrawQuad*>(quad);
         gfx::RectF texRect = texQuad->uvRect();
         texRect.Scale(bitmapSize.width(), bitmapSize.height());
         texRemaining.Subtract(Region(ToRoundedIntRect(texRect)));
     }
     EXPECT_RECT_EQ(texRemaining.bounds(), apertureRect);
     Region apertureRegion(apertureRect);
     EXPECT_EQ(texRemaining, apertureRegion);
 }
 
-}
+}  // namespace
+}  // namespace cc