Update modules classes to use OVERRIDE / FINAL when needed

Source/modules/speech/SpeechSynthesis.h

Index: Source/modules/speech/SpeechSynthesis.h
diff --git a/Source/modules/speech/SpeechSynthesis.h b/Source/modules/speech/SpeechSynthesis.h
index 2be821dbcbcc262029407307b30a051c9edd86f6..d1aa9b73245862b6f7911b92b2d9ec2d3595296b 100644
--- a/Source/modules/speech/SpeechSynthesis.h
+++ b/Source/modules/speech/SpeechSynthesis.h
@@ -44,7 +44,7 @@ class ExceptionState;
 class PlatformSpeechSynthesizerClient;
 class SpeechSynthesisVoice;
 
-class SpeechSynthesis : public PlatformSpeechSynthesizerClient, public ScriptWrappable, public RefCounted<SpeechSynthesis>, public ContextLifecycleObserver, public EventTargetWithInlineData {
+class SpeechSynthesis FINAL : public PlatformSpeechSynthesizerClient, public ScriptWrappable, public RefCounted<SpeechSynthesis>, public ContextLifecycleObserver, public EventTargetWithInlineData {
     REFCOUNTED_EVENT_TARGET(SpeechSynthesis);
 public:
     static PassRefPtr<SpeechSynthesis> create(ExecutionContext*);
@@ -65,7 +65,7 @@ public:
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(voiceschanged);
 
-    virtual ExecutionContext* executionContext() const;
+    virtual ExecutionContext* executionContext() const OVERRIDE;
 
 private:
     explicit SpeechSynthesis(ExecutionContext*);