cc: Remove forbidden using namespace directives.

cc/render_surface_filters_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_surface_filters.h"
 
 #include "cc/test/compositor_fake_web_graphics_context_3d.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include <public/WebFilterOperation.h>
 #include <public/WebFilterOperations.h>
 
-using namespace cc;
 using namespace WebKit;
 
+namespace cc {
 namespace {
 
 // Checks whether op can be combined with a following color matrix.
 bool isCombined(const WebFilterOperation& op)
 {
     WebFilterOperations filters;
     filters.append(op);
     filters.append(WebFilterOperation::createBrightnessFilter(0)); // brightness(0) is identity.
     WebFilterOperations optimized = RenderSurfaceFilters::optimize(filters);
     return optimized.size() == 1;
@@ skipping 103 matching lines @@
 
     filters.append(doesntCombine);
     optimized = RenderSurfaceFilters::optimize(filters);
     EXPECT_EQ(2u, optimized.size());
 
     filters.append(doesntCombine);
     optimized = RenderSurfaceFilters::optimize(filters);
     EXPECT_EQ(3u, optimized.size());
 }
 
-}  // anonymous namespace
+}  // namespace
+}  // namespace cc