Splitting out the Audio library.

sdk/lib/_internal/compiler/implementation/compiler.dart

 // 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.
 
 part of dart2js;
 
 /**
  * If true, print a warning for each method that was resolved, but not
  * compiled.
  */
@@ skipping 476 matching lines @@
   // TODO(karlklose,floitsch): move this to the javascript backend.
   /** Enable the 'JS' helper for a library if needed. */
   void maybeEnableJSHelper(LibraryElement library) {
     String libraryName = library.uri.toString();
     if (library.entryCompilationUnit.script.name.contains(
             'dart/tests/compiler/dart2js_native')
         || libraryName == 'dart:mirrors'
         || libraryName == 'dart:isolate'
         || libraryName == 'dart:math'
         || libraryName == 'dart:html'
-        || libraryName == 'dart:svg') {
+        || libraryName == 'dart:svg'
+        || libraryName == 'dart:web_audio') {

[Anton Muhin, 2012/11/22 03:22:51]

just for my education, why <web>_audio?  are there any plans to make it more
generic with different implementation on different platforms?  or it's too early
to talk about that?

[Anton Muhin, 2012/11/22 03:22:51]

it might be time to switch to a list contains, but it's your call

[blois, 2012/11/27 00:07:45]

I assume that there will be an audio for Android or other platforms as well. The
library is essentially entirely the 'Web Audio' API-
https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html

Also, my preferred design for audio on other platforms would be that we have a
dart:audio library which is the common subset, but then dart:web_audio would
'extend' that to provide additional functionality.

[blois, 2012/11/27 00:07:45]

Good point, I'd like to do that as a separate CL (and I have another CL out
which adds another item to this list).

       if (libraryName == 'dart:html' || libraryName == 'dart:mirrors') {
         // dart:html needs access to convertDartClosureToJS.
         // dart:mirrors needs access to the Primitives class.
         importHelperLibrary(library);
       }
       library.addToScope(findHelper(const SourceString('JS')), this);
       Element jsIndexingBehaviorInterface =
           findHelper(const SourceString('JavaScriptIndexingBehavior'));
       if (jsIndexingBehaviorInterface != null) {
         library.addToScope(jsIndexingBehaviorInterface, this);
@@ skipping 432 matching lines @@
   // TODO(johnniwinther): Use [spannable] and [message] to provide better
   // information on assertion errors.
   if (condition is Function){
     condition = condition();
   }
   if (spannable == null || !condition) {
     throw new SpannableAssertionFailure(spannable, message);
   }
   return true;
 }