Write skimage results to full builder_name.

slave/skia_slave_scripts/run_decoding_tests.py

 #!/usr/bin/env python
 # Copyright (c) 2013 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.
 
 """ Run the Skia skimage executable. """
 
 from build_step import BuildStep, BuildStepFailure, GM_EXPECTATIONS_FILENAME
 # builder_name_schema must be imported after build_step so the PYTHONPATH will
 # be set properly to import it.
 import builder_name_schema
 import run_gm
 import sys
 
 class RunDecodingTests(BuildStep):
   def _Run(self):
     cmd = ['-r', self._device_dirs.SKImageInDir(), '--noreencode']
 
-    subdir = builder_name_schema.GetWaterfallBot(self._builder_name)
-
     # Read expectations, which were downloaded/copied to the device.
+    # If this bot is a trybot, read the expected results of the waterfall bot.
     expectations_file = self._flavor_utils.DevicePathJoin(
-      self._device_dirs.SKImageExpectedDir(), subdir,
+      self._device_dirs.SKImageExpectedDir(),
+      builder_name_schema.GetWaterfallBot(self._builder_name),
       GM_EXPECTATIONS_FILENAME)
 
     have_expectations = self._flavor_utils.DevicePathExists(expectations_file)
     if have_expectations:
       cmd.extend(['--readExpectationsPath', expectations_file])
 
     # Write the expectations file, in case any did not match.
     device_subdir = self._flavor_utils.DevicePathJoin(
-        self._device_dirs.SKImageOutDir(), subdir)
+        self._device_dirs.SKImageOutDir(), self._builder_name)
     self._flavor_utils.CreateCleanDeviceDirectory(device_subdir)
     output_expectations_file = self._flavor_utils.DevicePathJoin(
         device_subdir, run_gm.JSON_SUMMARY_FILENAME)
 
     cmd.extend(['--createExpectationsPath', output_expectations_file])
 
     # Draw any mismatches to the same folder as the output json.
     cmd.extend(['--mismatchPath', self._device_dirs.SKImageOutDir()])
 
     self._flavor_utils.RunFlavoredCmd('skimage', cmd)
 
     # If there is no expectations file, still run the tests, and then report a
     # failure. Then we'll know to update the expectations with the results of
     # running the tests.
     if not have_expectations:
       raise BuildStepFailure("Missing expectations file " + expectations_file)
 
 if '__main__' == __name__:
   sys.exit(BuildStep.RunBuildStep(RunDecodingTests))