Adds saner behavior for git try -t foo to not fail in a inexplicable way. Enforces that each builde…

trychange.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.
 
 """Client-side script to send a try job to the try server. It communicates to
 the try server by either writting to a svn repository or by directly connecting
 to the server by HTTP.
 """
 
@@ skipping 787 matching lines @@
         options.bot = presubmit_support.DoGetTrySlaves(
             change,
             checkouts[0].GetFileNames(),
             checkouts[0].checkout_root,
             root_presubmit,
             options.project,
             False,
             sys.stdout)
       except ImportError:
         pass
+      if options.testfilter:
+        bots = set()
+        for bot in options.bot:
+          assert ',' not in bot
+          if bot.endswith(':compile'):
+            # Skip over compile-only builders for now.
+            continue
+          bots.add(bot.split(':', 1)[0])
+        options.bot = list(bots)
+
       # If no bot is specified, either the default pool will be selected or the
       # try server will refuse the job. Either case we don't need to interfere.
 
     if options.print_bots:
       print 'Bots which would be used:'
       for bot in options.bot:
         print '  %s' % bot
       return 0
 
     # Send the patch.
@@ skipping 20 matching lines @@
     return 1
   except (gclient_utils.Error, subprocess2.CalledProcessError), e:
     print >> sys.stderr, e
     return 1
   return 0
 
 
 if __name__ == "__main__":
   fix_encoding.fix_encoding()
   sys.exit(TryChange(None, None, False))