Make gn.py support root directories other than 'src'.

gn.py

Index: gn.py
diff --git a/gn.py b/gn.py
index e3bcc978356f7e473387629fa57352efb3dff31b..833805fdd89d122134ba82f310cc1e3532e14db5 100755
--- a/gn.py
+++ b/gn.py
@@ -26,7 +26,10 @@ def main(args):
                           'checkout.')
     sys.exit(1)
   gn_path = os.path.join(bin_path, 'gn' + gclient_utils.GetExeSuffix())
-  return subprocess.call([gn_path] + sys.argv[1:])
+  if not os.path.exists(gn_path):
+    print >> sys.stderr, 'gn.py: Could not find gn executable at: %s' % gn_path

[agable, 2014/09/05 11:31:53]

return 1 after this print, for an unsuccessful exit, and so the subprocess.call
below doesn't have to be inside an else:.

[kjellander_chromium, 2014/09/05 12:24:31]

Done.

+  else:
+    return subprocess.call([gn_path] + sys.argv[1:])
 
 
 if __name__ == '__main__':