Standardize usage of virtual/override/final in content/browser/

content/browser/dom_storage/dom_storage_area_unittest.cc

Index: content/browser/dom_storage/dom_storage_area_unittest.cc
diff --git a/content/browser/dom_storage/dom_storage_area_unittest.cc b/content/browser/dom_storage/dom_storage_area_unittest.cc
index 6c16b74c990a93def2e3b34c074ae5054b894350..c074cc0709bc0840638e131181d7cdb5160449d4 100644
--- a/content/browser/dom_storage/dom_storage_area_unittest.cc
+++ b/content/browser/dom_storage/dom_storage_area_unittest.cc
@@ -58,7 +58,7 @@ class DOMStorageAreaTest : public testing::Test {
   class VerifyChangesCommittedDatabase : public DOMStorageDatabase {
    public:
     VerifyChangesCommittedDatabase() {}
-    virtual ~VerifyChangesCommittedDatabase() {
+    ~VerifyChangesCommittedDatabase() override {
       const base::string16 kKey(ASCIIToUTF16("key"));
       const base::string16 kValue(ASCIIToUTF16("value"));
       DOMStorageValuesMap values;