cc: Remove forbidden using namespace directives.

cc/texture_layer_unittest.cc

Index: cc/texture_layer_unittest.cc
diff --git a/cc/texture_layer_unittest.cc b/cc/texture_layer_unittest.cc
index 6e659789e6b0f4bbb3b3a1b9a79b0c843478b14f..dc907037ce970f6e4b0b8285b90a19b4d1ec5d6f 100644
--- a/cc/texture_layer_unittest.cc
+++ b/cc/texture_layer_unittest.cc
@@ -14,12 +14,12 @@
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
-using namespace cc;
 using ::testing::Mock;
 using ::testing::_;
 using ::testing::AtLeast;
 using ::testing::AnyNumber;
 
+namespace cc {
 namespace {
 
 class MockLayerImplTreeHost : public LayerTreeHost {
@@ -182,4 +182,5 @@ TEST_F(TextureLayerTest, syncImplWhenRemovingFromTree)
     Mock::VerifyAndClearExpectations(m_layerTreeHost.get());
 }
 
-}  // anonymous namespace
+}  // namespace
+}  // namespace cc