[Android] Remove EMMA coverage html directory after upload.

build/android/buildbot/bb_device_steps.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.
 
 import collections
 import glob
 import hashlib
 import json
 import multiprocessing
@@ skipping 540 matching lines @@
       test_obj = INSTRUMENTATION_TESTS[options.install]
       InstallApk(options, test_obj, print_step=True)
 
     if options.test_filter:
       bb_utils.RunSteps(options.test_filter, GetTestStepCmds(), options)
 
     if options.coverage_bucket:
       coverage_html = GenerateJavaCoverageReport(options)
       UploadHTML(options, '%s/java' % options.coverage_bucket, coverage_html,
                  'Coverage Report')
+      shutil.rmtree(coverage_html, ignore_errors=True)
 
     if options.experimental:
       RunTestSuites(options, gtest_config.EXPERIMENTAL_TEST_SUITES)
 
   finally:
     # Run all post test steps
     LogcatDump(options)
     GenerateTestReport(options)
     # KillHostHeartbeat() has logic to check if heartbeat process is running,
     # and kills only if it finds the process is running on the host.
@@ skipping 48 matching lines @@
   setattr(options, 'target', options.factory_properties.get('target', 'Debug'))
   if options.coverage_bucket:
     setattr(options, 'coverage_dir',
             os.path.join(CHROME_OUT_DIR, options.target, 'coverage'))
 
   MainTestWrapper(options)
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv))