[Android] Adds directory cleanup/creation for code coverage

build/android/buildbot/bb_device_steps.py

Index: build/android/buildbot/bb_device_steps.py
diff --git a/build/android/buildbot/bb_device_steps.py b/build/android/buildbot/bb_device_steps.py
index 2cb431ed88b8de620212c936f1609340d6b92f4a..d6551c883f88968be04bff51d9d3151131759f81 100755
--- a/build/android/buildbot/bb_device_steps.py
+++ b/build/android/buildbot/bb_device_steps.py
@@ -268,7 +268,7 @@ def DeviceStatusCheck(_):
 def GetDeviceSetupStepCmds():
   return [
     ('provision_devices', ProvisionDevices),
-    ('device_status_check', DeviceStatusCheck)
+    ('device_status_check', DeviceStatusCheck),
   ]
 
 
@@ -372,6 +372,9 @@ def MainTestWrapper(options):
       test_obj = INSTRUMENTATION_TESTS[options.install]
       InstallApk(options, test_obj, print_step=True)
 
+    if options.coverage_bucket:
+      shutil.rmtree(options.coverage_dir, ignore_errors=True)

[Isaac (away), 2013/08/25 00:25:41]

This is a silent command and it runs during testing mode.

I'd prefer RunCmd(['rm', '-rf', <dir>]).

[frankf, 2013/08/26 17:49:00]

Done.

+
     if options.test_filter:
       bb_utils.RunSteps(options.test_filter, GetTestStepCmds(), options)