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

Source/modules/encryptedmedia/ContentDecryptionModuleResultPromise.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ContentDecryptionModuleResultPromise_h
 #define ContentDecryptionModuleResultPromise_h
 
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "core/dom/ExceptionCode.h"
 #include "platform/ContentDecryptionModuleResult.h"
 
 namespace blink {
 
 ExceptionCode WebCdmExceptionToExceptionCode(WebContentDecryptionModuleException);
 
 // This class wraps the promise resolver to simplify creation of
 // ContentDecryptionModuleResult objects. The default implementations of the
 // complete(), completeWithSession(), etc. methods will reject the promise
 // with an error. It needs to be subclassed and the appropriate complete()
 // method overridden to resolve the promise as needed.
 class ContentDecryptionModuleResultPromise : public ContentDecryptionModuleResult {
 public:
-    virtual ~ContentDecryptionModuleResultPromise();
+    ~ContentDecryptionModuleResultPromise() override;
 
     // ContentDecryptionModuleResult implementation.
-    virtual void complete() override;
-    virtual void completeWithContentDecryptionModule(WebContentDecryptionModule*) override;
-    virtual void completeWithSession(WebContentDecryptionModuleResult::SessionStatus) override;
-    virtual void completeWithError(WebContentDecryptionModuleException, unsigned long systemCode, const WebString&) final;
+    void complete() override;
+    void completeWithContentDecryptionModule(WebContentDecryptionModule*) override;
+    void completeWithSession(WebContentDecryptionModuleResult::SessionStatus) override;
+    void completeWithError(WebContentDecryptionModuleException, unsigned long systemCode, const WebString&) final;
 
     // It is only valid to call this before completion.
     ScriptPromise promise();
 
     DECLARE_VIRTUAL_TRACE();
 
 protected:
     explicit ContentDecryptionModuleResultPromise(ScriptState*);
 
     // Resolves the promise with |value|. Used by subclasses to resolve the
@@ skipping 10 matching lines @@
 
     ExecutionContext* executionContext() const;
 
 private:
     RefPtrWillBeMember<ScriptPromiseResolver> m_resolver;
 };
 
 } // namespace blink
 
 #endif // ContentDecryptionModuleResultPromise_h