[chromedriver] Update chrome_paths to use GN build directory.

chrome/test/chromedriver/chrome_paths.py

 # Copyright (c) 2012 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.
 
 """Paths to common resources in the Chrome repository."""
 
 import os
 
 
 _THIS_DIR = os.path.abspath(os.path.dirname(__file__))
 
 
 def GetSrc():
   """Returns the path to the root src directory."""
   return os.path.abspath(os.path.join(_THIS_DIR, os.pardir, os.pardir,
                                       os.pardir))
 
 
 def GetTestData():
   """Returns the path to the src/chrome/test/data directory."""
   return os.path.join(GetSrc(), 'chrome', 'test', 'data')
 
 
 def GetBuildDir(required_paths):
   """Returns the preferred build directory that contains given paths."""
-  dirs = ['out', 'build', 'xcodebuild']
-  rel_dirs = [os.path.join(x, 'Release') for x in dirs]
-  debug_dirs = [os.path.join(x, 'Debug') for x in dirs]
-  full_dirs = [os.path.join(GetSrc(), x) for x in rel_dirs + debug_dirs]
-  for build_dir in full_dirs:
-    for required_path in required_paths:
-      if not os.path.exists(os.path.join(build_dir, required_path)):
-        break
-    else:
-      return build_dir
-  raise RuntimeError('Cannot find build directory containing ' +
-                     ', '.join(required_paths))
+  build_dir = os.path.join(GetSrc(), 'out', 'Default')

[jbudorick, 2016/07/28 19:16:10]

I take it all the chromedriver bots are now generating into out/Default/?

+  for required_path in required_paths:
+    if not os.path.exists(os.path.join(build_dir, required_path)):
+      raise RuntimeError('Cannot find build directory containing ' +
+                         ', '.join(required_paths))
+  return build_dir