[Android] Create out directory for sharded perf tests during setup.

BUG=
R=bulach@chromium.org

Review URL: https://codereview.chromium.org/23601019

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@221731 0039d316-1c4b-4281-b951-d872f2087c98

build/android/pylib/constants.py

@@ -106,6 +106,7 @@ SDK_BUILD_JAVALIB_DIR = 'lib.java'
 SDK_BUILD_TEST_JAVALIB_DIR = 'test.lib.java'
 SDK_BUILD_APKS_DIR = 'apks'
 
+PERF_OUTPUT_DIR = os.path.join(DIR_SOURCE_ROOT, 'out', 'step_results')
 # The directory on the device where perf test output gets saved to.
 DEVICE_PERF_OUTPUT_DIR = '/data/data/' + CHROME_PACKAGE + '/files'
 

build/android/pylib/perf/setup.py

@@ -13,6 +13,7 @@ import time
 
 from pylib import android_commands
 from pylib import cmd_helper
+from pylib import constants
 from pylib import forwarder
 from pylib import ports
 
@@ -56,6 +57,9 @@ def Setup(test_options):
   Returns:
     A tuple of (TestRunnerFactory, tests).
   """
+  if not os.path.exists(constants.PERF_OUTPUT_DIR):
+    os.makedirs(constants.PERF_OUTPUT_DIR)
+
   # Before running the tests, kill any leftover server.
   _KillPendingServers()
 

build/android/pylib/perf/test_runner.py

@@ -46,16 +46,12 @@ import pexpect
 import pickle
 import os
 import sys
-import time
 
 from pylib import constants
 from pylib.base import base_test_result
 from pylib.base import base_test_runner
 
 
-_OUTPUT_DIR = os.path.join(constants.DIR_SOURCE_ROOT, 'out', 'step_results')
-
-
 def PrintTestOutput(test_name):
   """Helper method to print the output of previously executed test_name.
 
@@ -65,7 +61,7 @@ def PrintTestOutput(test_name):
   Returns:
     exit code generated by the test step.
   """
-  file_name = os.path.join(_OUTPUT_DIR, test_name)
+  file_name = os.path.join(constants.PERF_OUTPUT_DIR, test_name)
   if not os.path.exists(file_name):
     logging.error('File not found %s', file_name)
     return 1
@@ -98,7 +94,8 @@ class TestRunner(base_test_runner.BaseTestRunner):
 
   @staticmethod
   def _SaveResult(result):
-    with file(os.path.join(_OUTPUT_DIR, result['name']), 'w') as f:
+    with file(os.path.join(constants.PERF_OUTPUT_DIR,
+                           result['name']), 'w') as f:
       f.write(pickle.dumps(result))
 
   def _LaunchPerfTest(self, test_name):