cc: Remove forbidden using namespace directives.

cc/scrollbar_layer_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_layer.h"
 
 #include "cc/scrollbar_animation_controller.h"
 #include "cc/scrollbar_layer_impl.h"
 #include "cc/single_thread_proxy.h"
 #include "cc/test/fake_web_scrollbar_theme_geometry.h"
 #include "cc/tree_synchronizer.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include <public/WebScrollbar.h>
 #include <public/WebScrollbarThemeGeometry.h>
 #include <public/WebScrollbarThemePainter.h>
 
-using namespace cc;
-
+namespace cc {
 namespace {
 
 class FakeWebScrollbar : public WebKit::WebScrollbar {
 public:
     static scoped_ptr<FakeWebScrollbar> create() { return make_scoped_ptr(new FakeWebScrollbar()); }
 
     // WebScrollbar implementation
     virtual bool isOverlay() const OVERRIDE { return false; }
     virtual int value() const OVERRIDE { return 0; }
     virtual WebKit::WebPoint location() const OVERRIDE { return WebKit::WebPoint(); }
@@ skipping 86 matching lines @@
     EXPECT_EQ(1000, ccScrollbarLayer->totalSize());
     EXPECT_EQ(300, ccScrollbarLayer->maximum());
 
     layerImplTreeRoot->scrollBy(gfx::Vector2d(12, 34));
 
     EXPECT_EQ(112, ccScrollbarLayer->currentPos());
     EXPECT_EQ(1000, ccScrollbarLayer->totalSize());
     EXPECT_EQ(300, ccScrollbarLayer->maximum());
 }
 
-}  // anonymous namespace
+}  // namespace
+}  // namespace cc