Fix Typo in AudioNode type ENUM

One letter fix: kNoteTypeAudioWorklet -> kNodeTypeAudioWorklet

Change-Id: I8b122dfd2c54ee888906f88bf3e1ee9cd9250d4a
Reviewed-on: https://chromium-review.googlesource.com/568464Reviewed-by: Raymond Toy <rtoy@chromium.org>
Commit-Queue: Hongchan Choi <hongchan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#486104}

third_party/WebKit/Source/modules/webaudio/AudioNode.h

@@ -95,7 +95,7 @@ class MODULES_EXPORT AudioHandler : public ThreadSafeRefCounted<AudioHandler> {
     kNodeTypeWaveShaper = 18,
     kNodeTypeIIRFilter = 19,
     kNodeTypeConstantSource = 20,
-    kNoteTypeAudioWorklet = 21,
+    kNodeTypeAudioWorklet = 21,
     kNodeTypeEnd = 22
   };