Quota: Fix ifndef header guard.

Change-Id: Id268acba620b57196e06cc1160d95a7d2b036a17
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2028861Reviewed-by: Darwin Huang <huangdarwin@chromium.org>
Reviewed-by: Marijn Kruisselbrink <mek@chromium.org>
Commit-Queue: Darwin Huang <huangdarwin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#736993}

storage/browser/test/mock_quota_manager.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_QUOTA_MANAGER_H_
-#define CONTENT_BROWSER_QUOTA_MOCK_QUOTA_MANAGER_H_
+#ifndef STORAGE_BROWSER_TEST_MOCK_QUOTA_MANAGER_H_
+#define STORAGE_BROWSER_TEST_MOCK_QUOTA_MANAGER_H_
 
 #include <stdint.h>
 
@@ -147,4 +147,4 @@ class MockQuotaManager : public QuotaManager {
 
 }  // namespace content
 
-#endif  // CONTENT_BROWSER_QUOTA_MOCK_QUOTA_MANAGER_H_
+#endif  // STORAGE_BROWSER_TEST_MOCK_QUOTA_MANAGER_H_