Enable all Android builders to use 'chrome_with_codecs'.

tools/mb/mb.py

 #!/usr/bin/env python
 # Copyright 2015 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.
 
 """MB - the Meta-Build wrapper around GYP and GN
 
 MB is a wrapper script for GYP and GN that can be used to generate build files
 for sets of canned configurations and analyze them.
 """
@@ skipping 287 matching lines @@
         if not sub_mixin in self.mixins:
           errs.append('Unknown mixin "%s" referenced by mixin "%s".' %
                       (sub_mixin, mixin))
         referenced_mixins.add(sub_mixin)
 
     # Check that every mixin defined is actually referenced somewhere.
     for mixin in self.mixins:
       if not mixin in referenced_mixins:
         errs.append('Unreferenced mixin "%s".' % mixin)
 
+    # Check that 'chromium' bots which build public artifacts do not include
+    # the chrome_with_codecs 'mixin'.
+    if not 'chromium' in self.masters:
+      errs.append('Missing "chromium" master. Please update this proprietary '
+                  'codecs check with the name of the master responsible for '
+                  'public build artifacts.')
+    else:
+      for builder in self.masters['chromium']:
+        config = self.masters['chromium'][builder]
+        def RecurseMixins(current_mixin):
+          if current_mixin == 'chrome_with_codecs':
+            errs.append('Public artifact builder "%s" can not contain the '
+                        '"chrome_with_codecs" mixin.' % builder)
+            return
+          if not 'mixins' in self.mixins[current_mixin]:
+            return
+          for mixin in self.mixins[current_mixin]['mixins']:
+            RecurseMixins(mixin)
+
+        for mixin in self.configs[config]:
+          RecurseMixins(mixin)
+
     if errs:
       raise MBErr(('mb config file %s has problems:' % self.args.config_file) +
                     '\n  ' + '\n  '.join(errs))
 
     self.Print('mb config file %s looks ok.' % self.args.config_file)
     return 0
 
   def GetConfig(self):
     build_dir = self.args.path[0]
 
@@ skipping 837 matching lines @@
 
 if __name__ == '__main__':
   try:
     sys.exit(main(sys.argv[1:]))
   except MBErr as e:
     print(e)
     sys.exit(1)
   except KeyboardInterrupt:
     print("interrupted, exiting", stream=sys.stderr)
     sys.exit(130)