Fix virtual/override/final usage in Source/modules/.

Source/modules/quota/StorageQuotaCallbacksImpl.h

Index: Source/modules/quota/StorageQuotaCallbacksImpl.h
diff --git a/Source/modules/quota/StorageQuotaCallbacksImpl.h b/Source/modules/quota/StorageQuotaCallbacksImpl.h
index d8dc7a029b88552d9d38c2444ea0f03e0f8f4d17..5c7a23754b5c5505fcf2699c8dd5f562323f8999 100644
--- a/Source/modules/quota/StorageQuotaCallbacksImpl.h
+++ b/Source/modules/quota/StorageQuotaCallbacksImpl.h
@@ -48,11 +48,11 @@ public:
         return new StorageQuotaCallbacksImpl(resolver);
     }
 
-    virtual ~StorageQuotaCallbacksImpl();
+    ~StorageQuotaCallbacksImpl() override;
 
-    virtual void didQueryStorageUsageAndQuota(unsigned long long usageInBytes, unsigned long long quotaInBytes) override;
-    virtual void didGrantStorageQuota(unsigned long long usageInBytes, unsigned long long grantedQuotaInBytes) override;
-    virtual void didFail(WebStorageQuotaError) override;
+    void didQueryStorageUsageAndQuota(unsigned long long usageInBytes, unsigned long long quotaInBytes) override;
+    void didGrantStorageQuota(unsigned long long usageInBytes, unsigned long long grantedQuotaInBytes) override;
+    void didFail(WebStorageQuotaError) override;
 
     DECLARE_VIRTUAL_TRACE();