Add --goma_threads option to bisection tools

Lets user of run-bisect-manual-test.py specify a non-default value for
number of goma threads, and hooks this into Builder used by
bisect_perf_regression.py.

Example usage:
python tools/run-bisect-manual-test.py --browser=release -b 100 -g 50 -w ../../tmp --goma_threads 50

R=qyearsley@chromium.org
TEST=script passes through specified value that defaults to 64
Bug=none

Review URL: https://codereview.chromium.org/679353002

Cr-Commit-Position: refs/heads/master@{#301896}

1 files changed, 10 insertions, 4 deletions

diff --git a/tools/run-bisect-manual-test.py b/tools/run-bisect-manual-test.py
index 7b14577..96a7b0d 100755
--- a/tools/run-bisect-manual-test.py
+++ b/tools/run-bisect-manual-test.py
@@ -79,6 +79,9 @@ def _RunBisectionScript(options):
   if options.target_build_type:
     cmd.extend(['--target_build_type', options.target_build_type])
 
+  if options.goma_threads:
+    cmd.extend(['--goma_threads', options.goma_threads])
+
   cmd = [str(c) for c in cmd]
 
   return_code = subprocess.call(cmd)
@@ -122,10 +125,13 @@ def main():
                     help='Path to extra source file. If this is supplied, '
                     'bisect script will use this to override default behavior.')
   parser.add_option('--target_build_type',
-                     type='choice',
-                     choices=['Release', 'Debug'],
-                     help='The target build type. Choices are "Release" '
-                     'or "Debug".')
+                    type='choice',
+                    choices=['Release', 'Debug'],
+                    help='The target build type. Choices are "Release" '
+                    'or "Debug".')
+  parser.add_option('--goma_threads',
+                    type='int',
+                    help='Number of goma threads to use.')
   options, _ = parser.parse_args()
   error_msg = ''
   if not options.good_revision: