cc: Remove forbidden using namespace directives.

cc/nine_patch_layer_unittest.cc

Index: cc/nine_patch_layer_unittest.cc
diff --git a/cc/nine_patch_layer_unittest.cc b/cc/nine_patch_layer_unittest.cc
index 3958b9299f4d91f5aae9759a994778b1b36721fd..4e13d348c5a95f8922e05be6b010ae6a0452147f 100644
--- a/cc/nine_patch_layer_unittest.cc
+++ b/cc/nine_patch_layer_unittest.cc
@@ -22,12 +22,12 @@
 #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 MockLayerTreeHost : public LayerTreeHost {
@@ -135,4 +135,5 @@ TEST_F(NinePatchLayerTest, triggerFullUploadOnceWhenChangingBitmap)
     EXPECT_EQ(queue.partialUploadSize(), 0);
 }
 
-} // anonymous namespace
+}  // namespace
+}  // namespace cc