Add type maps from blink name to html name

sdk/lib/web_audio/dartium/web_audio_dartium.dart

 library dart.dom.web_audio;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:_internal' hide deprecated;
 import 'dart:html';
 import 'dart:html_common';
 import 'dart:nativewrappers';
 import 'dart:typed_data';
 import 'dart:_blink' as _blink;
 // DO NOT EDIT
 // Auto-generated dart:audio library.
 
 
 
 
+// FIXME: Can we make this private?
+const web_audioBlinkMap = const {
+  'AnalyserNode': AnalyserNode,
+  'AudioBuffer': AudioBuffer,
+  'AudioBufferSourceNode': AudioBufferSourceNode,
+  'AudioContext': AudioContext,
+  'AudioDestinationNode': AudioDestinationNode,
+  'AudioListener': AudioListener,
+  'AudioNode': AudioNode,
+  'AudioParam': AudioParam,
+  'AudioProcessingEvent': AudioProcessingEvent,
+  'AudioSourceNode': AudioSourceNode,
+  'BiquadFilterNode': BiquadFilterNode,
+  'ChannelMergerNode': ChannelMergerNode,
+  'ChannelSplitterNode': ChannelSplitterNode,
+  'ConvolverNode': ConvolverNode,
+  'DelayNode': DelayNode,
+  'DynamicsCompressorNode': DynamicsCompressorNode,
+  'GainNode': GainNode,
+  'MediaElementAudioSourceNode': MediaElementAudioSourceNode,
+  'MediaStreamAudioDestinationNode': MediaStreamAudioDestinationNode,
+  'MediaStreamAudioSourceNode': MediaStreamAudioSourceNode,
+  'OfflineAudioCompletionEvent': OfflineAudioCompletionEvent,
+  'OfflineAudioContext': OfflineAudioContext,
+  'OscillatorNode': OscillatorNode,
+  'PannerNode': PannerNode,
+  'PeriodicWave': PeriodicWave,
+  'ScriptProcessorNode': ScriptProcessorNode,
+  'WaveShaperNode': WaveShaperNode,
+
+};
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // WARNING: Do not edit - generated code.
 
 
 @DocsEditable()
 @DomName('AnalyserNode')
 // https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html#AnalyserNode
@@ skipping 1222 matching lines @@
 
   @DomName('WaveShaperNode.oversample')
   @DocsEditable()
   String get oversample => _blink.Native_WaveShaperNode_oversample_Getter(this);
 
   @DomName('WaveShaperNode.oversample')
   @DocsEditable()
   void set oversample(String value) => _blink.Native_WaveShaperNode_oversample_Setter(this, value);
 
 }