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

Source/web/StorageQuotaClientImpl.h

Index: Source/web/StorageQuotaClientImpl.h
diff --git a/Source/web/StorageQuotaClientImpl.h b/Source/web/StorageQuotaClientImpl.h
index eaf29613f5d3339330e6726cb3701a3a64d8d666..a03731480723a90276fbd2a4059a7e6f5d9fc7b7 100644
--- a/Source/web/StorageQuotaClientImpl.h
+++ b/Source/web/StorageQuotaClientImpl.h
@@ -44,10 +44,10 @@ public:
         return adoptPtrWillBeNoop(new StorageQuotaClientImpl());
     }
 
-    virtual ~StorageQuotaClientImpl();
+    ~StorageQuotaClientImpl() override;
 
-    virtual void requestQuota(ExecutionContext*, WebStorageQuotaType, unsigned long long newQuotaInBytes, StorageQuotaCallback*, StorageErrorCallback*) override;
-    virtual ScriptPromise requestPersistentQuota(ScriptState*, unsigned long long newQuotaInBytes) override;
+    void requestQuota(ExecutionContext*, WebStorageQuotaType, unsigned long long newQuotaInBytes, StorageQuotaCallback*, StorageErrorCallback*) override;
+    ScriptPromise requestPersistentQuota(ScriptState*, unsigned long long newQuotaInBytes) override;
 
     DEFINE_INLINE_VIRTUAL_TRACE() { StorageQuotaClient::trace(visitor); }