Remove enum types which are duplicated and cause error on webkit style checker.

Source/modules/webaudio/PannerNode.h

 /*
  * Copyright (C) 2010, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 29 matching lines @@
 
 // PannerNode is an AudioNode with one input and one output.
 // It positions a sound in 3D space, with the exact effect dependent on the panning model.
 // It has a position and an orientation in 3D space which is relative to the position and orientation of the context's AudioListener.
 // A distance effect will attenuate the gain as the position moves away from the listener.
 // A cone effect will attenuate the gain as the orientation moves away from the listener.
 // All of these effects follow the OpenAL specification very closely.
 
 class PannerNode FINAL : public AudioNode {
 public:
-    // These must be defined as in the .idl file and must match those in the Panner class.
-    enum {
-        EQUALPOWER = 0,
-        HRTF = 1,
-    };
-
-    // These must be defined as in the .idl file and must match those
-    // in the DistanceEffect class.
-    enum {
-        LINEAR_DISTANCE = 0,
-        INVERSE_DISTANCE = 1,
-        EXPONENTIAL_DISTANCE = 2,
-    };
-
     // These enums are used to distinguish what cached values of panner are dirty.
     enum {
         AzimuthElevationDirty = 0x1,
         DistanceConeGainDirty = 0x2,
         DopplerRateDirty = 0x4,
     };
 
     static PassRefPtr<PannerNode> create(AudioContext* context, float sampleRate)
     {
         return adoptRef(new PannerNode(context, sampleRate));
@@ skipping 100 matching lines @@
     // AudioContext's connection count
     unsigned m_connectionCount;
 
     // Synchronize process() with setting of the panning model, source's location information, listener, distance parameters and sound cones.
     mutable Mutex m_processLock;
 };
 
 } // namespace WebCore
 
 #endif // PannerNode_h