Add an Android perf bisect bot and its host steps.

build/android/buildbot/bb_host_steps.py

 #!/usr/bin/env python
 # Copyright 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 os
 import sys
 
 import bb_utils
 
@@ skipping 74 matching lines @@
   buildbot_report.PrintNamedStep('findbugs')
   build_type = []
   if is_release:
     build_type = ['--release-build']
   RunCmd([SrcPath('build', 'android', 'findbugs_diff.py')] + build_type)
   RunCmd([SrcPath(
       'tools', 'android', 'findbugs_plugin', 'test',
       'run_findbugs_plugin_tests.py')] + build_type)
 
 
+def BisectPerfRegression():
+  buildbot_report.PrintNamedStep('Preparing for Bisection')

[Isaac (away), 2013/06/11 02:06:44]

Can you make this a single step instead of two buildbot steps?

+  RunCmd([SrcPath('tools', 'prepare-bisect-perf-regression.py'),
+          '-w', os.path.join(constants.DIR_SOURCE_ROOT, os.pardir)])
+  buildbot_report.PrintNamedStep('Running Bisection')
+  RunCmd([SrcPath('tools', 'run-bisect-perf-regression.py'),
+          '-w', os.path.join(constants.DIR_SOURCE_ROOT, os.pardir),
+          '-p', bb_utils.GOMA_DIR])
+
+
 def main(argv):
   parser = bb_utils.GetParser()
   parser.add_option('--host-tests', help='Comma separated list of host tests.')
   parser.add_option('--build-args', default='All',
                     help='Comma separated list of build targets.')
   parser.add_option('--compile', action='store_true',
                     help='Indicate whether a compile step should be run.')
   parser.add_option('--experimental', action='store_true',
                     help='Indicate whether to compile experimental targets.')
   parser.add_option('--zip-build', action='store_true',
                     help='Indicate whether the build should be zipped.')
   parser.add_option('--extract-build', action='store_true',
                     help='Indicate whether a build should be downloaded.')
+  parser.add_option('--bisect-perf-regression', action='store_true',
+                    help='Bisect a perf regression.')
 
   options, args = parser.parse_args(argv[1:])
   if args:
     return sys.exit('Unused args %s' % args)
 
   host_tests = []
   if options.host_tests:
     host_tests = options.host_tests.split(',')
   unknown_tests = set(host_tests) - VALID_HOST_TESTS
   if unknown_tests:
     return sys.exit('Unknown host tests %s' % list(unknown_tests))
 
   build_type = options.factory_properties.get('target', 'Debug')
 
+  if options.bisect_perf_regression:
+    BisectPerfRegression()
   if options.compile:
     if 'check_webview_licenses' in host_tests:
       CheckWebViewLicenses()
     RunHooks(build_type)
     Compile(build_type, options.build_args.split(','))
     if options.experimental:
       Compile(build_type, EXPERIMENTAL_TARGETS, True)
     if 'findbugs' in host_tests:
       FindBugs(build_type == 'Release')
     if options.zip_build:
       ZipBuild(bb_utils.EncodeProperties(options))
   if options.extract_build:
     ExtractBuild(bb_utils.EncodeProperties(options))
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv))