Change GitCL to initialize git executable name on Windows.

third_party/WebKit/Tools/Scripts/webkitpy/common/net/git_cl.py

 # Copyright 2016 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.
 
 """An interface to git-cl.
 
 The git-cl tool is responsible for communicating with Rietveld, Gerrit,
 and Buildbucket to manage changelists and try jobs associated with them.
 """
 
 import json
 import logging
 import re
 
 from webkitpy.common.net.buildbot import Build, filter_latest_builds
+from webkitpy.common.checkout.git import Git
 
 _log = logging.getLogger(__name__)
 
 # A refresh token may be needed for some commands, such as git cl try,
 # in order to authenticate with buildbucket.
 _COMMANDS_THAT_TAKE_REFRESH_TOKEN = ('try',)
 
 
 class GitCL(object):
 
     def __init__(self, host, auth_refresh_token_json=None, cwd=None):
         self._host = host
         self._auth_refresh_token_json = auth_refresh_token_json
         self._cwd = cwd
+        self._git_executable_name = Git.find_executable_name(host.executive, host.platform)
 
     def run(self, args):
         """Runs git-cl with the given arguments and returns the output."""
-        command = ['git', 'cl'] + args
+        command = [self._git_executable_name, 'cl'] + args
         if self._auth_refresh_token_json and args[0] in _COMMANDS_THAT_TAKE_REFRESH_TOKEN:
             command += ['--auth-refresh-token-json', self._auth_refresh_token_json]
         return self._host.executive.run_command(command, cwd=self._cwd)
 
     def trigger_try_jobs(self, builders=None):
         builders = builders or self._host.builders.all_try_builder_names()
         if 'android_blink_rel' in builders:
             self.run(['try', '-b', 'android_blink_rel'])
             builders.remove('android_blink_rel')
         # TODO(qyearsley): Stop explicitly adding the master name when
@@ skipping 71 matching lines @@
         assert build_number and build_number.isdigit()
         return Build(builder_name, int(build_number))
 
     @staticmethod
     def all_jobs_finished(try_results):
         return all(r.get('status') == 'COMPLETED' for r in try_results)
 
     @staticmethod
     def has_failing_try_results(try_results):
         return any(r.get('result') == 'FAILURE' for r in try_results)