Fix appcache_test_helper.h header guard

content/test/appcache_test_helper.h

Index: content/test/appcache_test_helper.h
diff --git a/content/test/appcache_test_helper.h b/content/test/appcache_test_helper.h
index 0b5ee4a563ad702bbf49063a659c494d19b313d3..184e4273fb8032ded15b3c4d56193c473551fe4d 100644
--- a/content/test/appcache_test_helper.h
+++ b/content/test/appcache_test_helper.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CONTENT_PUBLIC_TEST_APPCACHE_TEST_HELPER_H_
-#define CONTENT_PUBLIC_TEST_APPCACHE_TEST_HELPER_H_
+#ifndef CONTENT_TEST_APPCACHE_TEST_HELPER_H_
+#define CONTENT_TEST_APPCACHE_TEST_HELPER_H_
 
 #include <set>
 
@@ -45,4 +45,4 @@ class AppCacheTestHelper : public appcache::AppCacheStorage::Delegate {
 
 }  // namespace content
 
-#endif  // CONTENT_PUBLIC_TEST_APPCACHE_TEST_HELPER_H_
+#endif  // CONTENT_TEST_APPCACHE_TEST_HELPER_H_