Set timeout before killing a process to 30 times the 30-second nag

timer, i.e. ~900 seconds.

This should at least help make 'fetch chromium' slightly more reliable
over somewhat slow connections.

BUG=230691,247173
R=rogerta@chromium.org

Review URL: https://codereview.chromium.org/18150002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@210190 0039d316-1c4b-4281-b951-d872f2087c98

gclient_scm.py

@@ -123,7 +123,7 @@ class SCMWrapper(object):
   This is the abstraction layer to bind to different SCM.
   """
   nag_timer = 30
-  nag_max = 6
+  nag_max = 30
 
   def __init__(self, url=None, root_dir=None, relpath=None):
     self.url = url