cc: Remove forbidden using namespace directives.

cc/damage_tracker_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/damage_tracker.h"
 
 #include "cc/layer_impl.h"
 #include "cc/layer_sorter.h"
 #include "cc/layer_tree_host_common.h"
 #include "cc/math_util.h"
 #include "cc/single_thread_proxy.h"
 #include "cc/test/geometry_test_utils.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/effects/SkBlurImageFilter.h"
 #include <public/WebFilterOperation.h>
 #include <public/WebFilterOperations.h>
 
-using namespace cc;
 using namespace WebKit;
 using namespace WebKitTests;
 
+namespace cc {
 namespace {
 
 void executeCalculateDrawTransformsAndVisibility(LayerImpl* root, std::vector<LayerImpl*>& renderSurfaceLayerList)
 {
     LayerSorter layerSorter;
     int dummyMaxTextureSize = 512;
 
     // Sanity check: The test itself should create the root layer's render surface, so
     //               that the surface (and its damage tracker) can persist across multiple
     //               calls to this function.
@@ skipping 1116 matching lines @@
     root->renderSurface()->damageTracker()->didDrawDamagedArea();
     rootDamageRect = root->renderSurface()->damageTracker()->currentDamageRect();
     EXPECT_TRUE(rootDamageRect.IsEmpty());
 
     // Damage should remain empty even after one frame, since there's yet no new damage
     emulateDrawingOneFrame(root.get());
     rootDamageRect = root->renderSurface()->damageTracker()->currentDamageRect();
     EXPECT_TRUE(rootDamageRect.IsEmpty());
 }
 
-}  // anonymous namespace
+}  // namespace
+}  // namespace cc