Fix the build with WEB_AUDIO disabled.

tools/dom/scripts/dartdomgenerator.py

Index: tools/dom/scripts/dartdomgenerator.py
diff --git a/tools/dom/scripts/dartdomgenerator.py b/tools/dom/scripts/dartdomgenerator.py
index 149ae8643204edabe987e8d8d6eb849fcc7178fe..6af0d7da95bd301afcb706cc0e8b2f91c48fb38f 100755
--- a/tools/dom/scripts/dartdomgenerator.py
+++ b/tools/dom/scripts/dartdomgenerator.py
@@ -20,7 +20,8 @@ from generator import TypeRegistry
 from htmleventgenerator import HtmlEventGenerator
 from htmlrenamer import HtmlRenamer
 from systemhtml import DartLibraryEmitter, Dart2JSBackend,\
-                       HtmlDartInterfaceGenerator, DartLibrary, DartLibraries
+                       HtmlDartInterfaceGenerator, DartLibrary, DartLibraries,\
+                       HTML_LIBRARY_NAMES
 from systemnative import CPPLibraryEmitter, DartiumBackend
 from templateloader import TemplateLoader
 
@@ -29,9 +30,6 @@ import utils
 
 _logger = logging.getLogger('dartdomgenerator')
 
-_libraries = ['chrome', 'html', 'indexed_db', 'svg', 'web_audio', 'web_gl',
-    'web_sql']
-
 class GeneratorOptions(object):
   def __init__(self, templates, database, type_registry, renamer):
     self.templates = templates
@@ -102,7 +100,7 @@ def GenerateFromDatabase(common_database, dart2js_output_dir,
 
     dart_output_dir = os.path.join(dart2js_output_dir, 'dart')
     dart_libraries = DartLibraries(
-        _libraries, template_loader, 'dart2js', dart2js_output_dir)
+        HTML_LIBRARY_NAMES, template_loader, 'dart2js', dart2js_output_dir)
 
     RunGenerator(dart_libraries, dart_output_dir,
         template_loader, backend_factory)
@@ -121,7 +119,7 @@ def GenerateFromDatabase(common_database, dart2js_output_dir,
 
     dart_output_dir = os.path.join(dartium_output_dir, 'dart')
     dart_libraries = DartLibraries(
-        _libraries, template_loader, 'dartium', dartium_output_dir)
+        HTML_LIBRARY_NAMES, template_loader, 'dartium', dartium_output_dir)
 
     RunGenerator(dart_libraries, dart_output_dir,
                  template_loader, backend_factory)
@@ -195,13 +193,13 @@ def main():
 
   if 'htmldart2js' in systems:
     _logger.info('Generating dart2js single files.')
-    for library_name in _libraries:
+    for library_name in HTML_LIBRARY_NAMES:
       GenerateSingleFile(
           os.path.join(dart2js_output_dir, '%s_dart2js.dart' % library_name),
           os.path.join('..', '..', '..', 'sdk', 'lib', library_name, 'dart2js'))
   if 'htmldartium' in systems:
     _logger.info('Generating dartium single files.')
-    for library_name in _libraries:
+    for library_name in HTML_LIBRARY_NAMES:
       GenerateSingleFile(
           os.path.join(dartium_output_dir, '%s_dartium.dart' % library_name),
           os.path.join('..', '..', '..', 'sdk', 'lib', library_name, 'dartium'))