Android: adds an option to print all sharded steps.

This is necessary to decouple buildbots and the app repository.

BUG=

Review URL: https://chromiumcodereview.appspot.com/17616008

git-svn-id: http://src.chromium.org/svn/trunk/src/build@209681 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

android/bb_run_sharded_steps.py

@@ -153,6 +153,15 @@ def _PrintStepOutput(step_name):
   return result['exit_code']
 
 
+def _PrintAllStepsOutput(steps):
+  with file(steps, 'r') as f:
+    steps = json.load(f)
+  ret = 0
+  for step_name in steps.keys():
+    ret |= _PrintStepOutput(step_name)
+  return ret
+
+
 def _KillPendingServers():
   for retry in range(5):
     for server in ['lighttpd', 'web-page-replay']:
@@ -177,9 +186,14 @@ def main(argv):
   parser.add_option('-p', '--print_results',
                     help='Only prints the results for the previously '
                          'executed step, do not run it again.')
+  parser.add_option('-P', '--print_all',
+                    help='Only prints the results for the previously '
+                         'executed steps, do not run them again.')
   options, urls = parser.parse_args(argv)
   if options.print_results:
     return _PrintStepOutput(options.print_results)
+  if options.print_all:
+    return _PrintAllStepsOutput(options.print_all)
 
   # At this point, we should kill everything that may have been left over from
   # previous runs.