Replace FINAL and OVERRIDE with their C++11 counterparts in Source/modules

Source/modules/webaudio/GainNode.h

Index: Source/modules/webaudio/GainNode.h
diff --git a/Source/modules/webaudio/GainNode.h b/Source/modules/webaudio/GainNode.h
index 48d83b9b8a5505b6e7ab600617f0be48c7c60c7e..29719373b29bce95c877a2657e5cb946d7d6ad24 100644
--- a/Source/modules/webaudio/GainNode.h
+++ b/Source/modules/webaudio/GainNode.h
@@ -37,7 +37,7 @@ class AudioContext;
 // GainNode is an AudioNode with one input and one output which applies a gain (volume) change to the audio signal.
 // De-zippering (smoothing) is applied when the gain value is changed dynamically.
 
-class GainNode FINAL : public AudioNode {
+class GainNode final : public AudioNode {
     DEFINE_WRAPPERTYPEINFO();
 public:
     static GainNode* create(AudioContext* context, float sampleRate)
@@ -46,19 +46,19 @@ public:
     }
 
     // AudioNode
-    virtual void process(size_t framesToProcess) OVERRIDE;
+    virtual void process(size_t framesToProcess) override;
 
     // Called in the main thread when the number of channels for the input may have changed.
-    virtual void checkNumberOfChannelsForInput(AudioNodeInput*) OVERRIDE;
+    virtual void checkNumberOfChannelsForInput(AudioNodeInput*) override;
 
     // JavaScript interface
     AudioParam* gain() { return m_gain.get(); }
 
-    virtual void trace(Visitor*) OVERRIDE;
+    virtual void trace(Visitor*) override;
 
 private:
-    virtual double tailTime() const OVERRIDE { return 0; }
-    virtual double latencyTime() const OVERRIDE { return 0; }
+    virtual double tailTime() const override { return 0; }
+    virtual double latencyTime() const override { return 0; }
 
     GainNode(AudioContext*, float sampleRate);