WebAudio: Remove legacy support for numerical values for Oscillator types.

Source/modules/webaudio/OscillatorNode.h

Index: Source/modules/webaudio/OscillatorNode.h
diff --git a/Source/modules/webaudio/OscillatorNode.h b/Source/modules/webaudio/OscillatorNode.h
index 9f02d52a95c4a9c25325f7aa1397e2a3a48b5bdd..7e23c99ab05b9bf847e5f6f190fb55ac77b166d4 100644
--- a/Source/modules/webaudio/OscillatorNode.h
+++ b/Source/modules/webaudio/OscillatorNode.h
@@ -61,7 +61,6 @@ public:
 
     String type() const;
 
-    bool setType(unsigned); // Returns true on success.
     void setType(const String&);
 
     AudioParam* frequency() { return m_frequency.get(); }
@@ -72,6 +71,8 @@ public:
 private:
     OscillatorNode(AudioContext*, float sampleRate);
 
+    bool setType(unsigned); // Returns true on success.
+
     // Returns true if there are sample-accurate timeline parameter changes.
     bool calculateSampleAccuratePhaseIncrements(size_t framesToProcess);