Set the MAXLEN/maxLength attribute for strings in ADM[X] templates.

grit/format/policy_templates/writers/adm_writer.py

 #!/usr/bin/env python
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 
 from grit.format.policy_templates.writers import template_writer
 
 
 NEWLINE = '\r\n'
@@ skipping 104 matching lines @@
     if policy['type'] in ('list', 'string-enum-list'):
       # Note that the following line causes FullArmor ADMX Migrator to create
       # corrupt ADMX files. Please use admx_writer to get ADMX files.
       builder.AddLine('KEYNAME "%s\\%s"' % (key_name, policy['name']))
       builder.AddLine('VALUEPREFIX ""')
     else:
       builder.AddLine('VALUENAME "%s"' % policy['name'])
     if policy['type'] == 'int':
       # The default max for NUMERIC values is 9999 which is too small for us.
       builder.AddLine('MIN 0 MAX 2000000000')
+    if policy['type'] in ('string', 'dict'):
+      # The default max for EDITTEXT values is 1023, which is too small for
+      # big JSON blobs and other string policies.
+      builder.AddLine('MAXLEN 1000000')
     if policy['type'] in ('int-enum', 'string-enum'):
       builder.AddLine('ITEMLIST', 1)
       for item in policy['items']:
         if policy['type'] == 'int-enum':
           value_text = 'NUMERIC ' + str(item['value'])
         else:
           value_text = '"' + item['value'] + '"'
         string_id = self._Escape(item['name'] + '_DropDown')
         builder.AddLine('NAME !!%s VALUE %s' % (string_id, value_text))
         self._AddGuiString(string_id, item['caption'])
@@ skipping 126 matching lines @@
     self.strings = IndentedStringBuilder()
     # Map of strings seen, to avoid duplicates.
     self.strings_seen = {}
     # String buffer for building the policies of the ADM file.
     self.policies = IndentedStringBuilder()
     # String buffer for building the recommended policies of the ADM file.
     self.recommended_policies = IndentedStringBuilder()
 
   def GetTemplateText(self):
     return self.lines.ToString()