Cleanup: Fix content header include guards.

content/public/test/mock_special_storage_policy.h

Index: content/public/test/mock_special_storage_policy.h
diff --git a/content/public/test/mock_special_storage_policy.h b/content/public/test/mock_special_storage_policy.h
index d708827512bc0d39c9041d43e8f172580ca12d2b..2d7ce62fd7db267ac93cfd7440aed4032ab411d5 100644
--- a/content/public/test/mock_special_storage_policy.h
+++ b/content/public/test/mock_special_storage_policy.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_BROWSER_QUOTA_MOCK_SPECIAL_STORAGE_POLICY_H_
-#define CONTENT_BROWSER_QUOTA_MOCK_SPECIAL_STORAGE_POLICY_H_
+#ifndef CONTENT_PUBLIC_TEST_MOCK_SPECIAL_STORAGE_POLICY_H_
+#define CONTENT_PUBLIC_TEST_MOCK_SPECIAL_STORAGE_POLICY_H_
 
 #include <set>
 #include <string>
@@ -100,4 +100,4 @@ class MockSpecialStoragePolicy : public storage::SpecialStoragePolicy {
 };
 }  // namespace content
 
-#endif  // CONTENT_BROWSER_QUOTA_MOCK_SPECIAL_STORAGE_POLICY_H_
+#endif  // CONTENT_PUBLIC_TEST_MOCK_SPECIAL_STORAGE_POLICY_H_