[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..8202fade20fe82eb3297b520378c85878574cd57 100755
--- a/build/android/buildbot/bb_device_steps.py
+++ b/build/android/buildbot/bb_device_steps.py
@@ -268,7 +268,8 @@ def DeviceStatusCheck(_):
 def GetDeviceSetupStepCmds():
   return [
     ('provision_devices', ProvisionDevices),
-    ('device_status_check', DeviceStatusCheck)
+    ('device_status_check', DeviceStatusCheck),
+    ('coverage_setup', CoverageSetup)
   ]
 
 
@@ -301,6 +302,15 @@ def GetTestStepCmds():
   ]
 
 
+def CoverageSetup(options):
+  """Sets up the coverage directory as a buildbot step."""
+  if options.coverage_bucket:
+    bb_annotations.PrintNamedStep('coverage_setup')
+    print 'Clearing the coverange directory: %s' % options.coverage_dir
+    shutil.rmtree(options.coverage_dir, ignore_errors=True)
+    os.mkdir(options.coverage_dir)

[frankf, 2013/08/24 02:17:19]

It makes more sense to do this in pylib/instrumentation/setup.py

+
+
 def UploadCoverageData(options, path, coverage_type):
   """Uploads directory at |path| to Google Storage.