cc: Remove forbidden using namespace directives.

cc/texture_copier_unittest.cc

Index: cc/texture_copier_unittest.cc
diff --git a/cc/texture_copier_unittest.cc b/cc/texture_copier_unittest.cc
index 5765c516a1f342c1d1cddcd36a2b2f2fa37a0ef7..9a6f4f981a5cc5aea115e244ef8b634bf3a291f6 100644
--- a/cc/texture_copier_unittest.cc
+++ b/cc/texture_copier_unittest.cc
@@ -11,12 +11,12 @@
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/khronos/GLES2/gl2.h"
 
-using namespace cc;
 using namespace WebKit;
 using testing::InSequence;
 using testing::Test;
 using testing::_;
 
+namespace cc {
 namespace {
 
 class MockContext : public FakeWebGraphicsContext3D {
@@ -64,4 +64,5 @@ TEST(TextureCopierTest, testDrawArraysCopy)
     copier->copyTexture(copy);
 }
 
-}  // anonymous namespace
+}  // namespace
+}  // namespace cc