cc: Unify namespaces for all test files

cc/test/fake_layer_tree_host_client.h

Index: cc/test/fake_layer_tree_host_client.h
diff --git a/cc/test/fake_layer_tree_host_client.h b/cc/test/fake_layer_tree_host_client.h
index 9e5cdfcbc4e65dfc091fac30d383df4d68554230..1741d15934e3268dd47dbf4988f8b1f2b2040d44 100644
--- a/cc/test/fake_layer_tree_host_client.h
+++ b/cc/test/fake_layer_tree_host_client.h
@@ -1,6 +1,7 @@
 // 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.
+
 #ifndef CC_TEST_FAKE_LAYER_TREE_HOST_CLIENT_H_
 #define CC_TEST_FAKE_LAYER_TREE_HOST_CLIENT_H_
 
@@ -45,5 +46,6 @@ private:
     bool m_useDelegatingRenderer;
 };
 
-}
+}  // namespace cc
+
 #endif  // CC_TEST_FAKE_LAYER_TREE_HOST_CLIENT_H_