Rollback to 1024m max heap.

editor/build/build.py

 #!/usr/bin/env python
 #
 # Copyright (c) 2013, 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.
 
 import glob
 import gsutil
 import imp
 import optparse
@@ skipping 949 matching lines @@
               '<dict>\n\t<key>NSHighResolutionCapable</key>\n\t\t<true/>')])
         bot_utils.run(['zip', '-q', zipFile, infofile], env=os.environ)
         os.remove(infofile)
 
 
 def Modify64BitDartEditorIni(iniFilePath):
   f = open(iniFilePath, 'r')
   lines = f.readlines()
   f.close()
   lines[lines.index('-Xms40m\n')] = '-Xms256m\n'
-  lines[lines.index('-Xmx1850m\n')] = '-Xmx2000m\n'
+  lines[lines.index('-Xmx1024m\n')] = '-Xmx2000m\n'
   # Add -d64 to give better error messages to user in 64 bit mode.
   lines[lines.index('-vmargs\n')] = '-vmargs\n-d64\n'
   f = open(iniFilePath, 'w')
   f.writelines(lines)
   f.close()
 
 
 def RunEditorTests(buildout, buildos):
   StartBuildStep('run_tests')
 
@@ skipping 269 matching lines @@
 def FileDelete(f):
   """delete the given file - do not re-throw any exceptions that occur"""
   if os.path.exists(f):
     try:
       os.remove(f)
     except OSError:
       print 'error deleting %s' % f
 
 if __name__ == '__main__':
   sys.exit(main())