Update toolchain setup instructions to match reality.

BUG=none
NOTRY=true
NOPRESUBMIT=true

Review URL: https://codereview.chromium.org/1131643003

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@295155 0039d316-1c4b-4281-b951-d872f2087c98

win_toolchain/get_toolchain_if_necessary.py

@@ -166,7 +166,7 @@ def RequestGsAuthentication():
   print 'and follow the instructions.'
   print
   print 'NOTE 1: Use your google.com credentials, not chromium.org.'
-  print 'NOTE 2: Just press Enter when asked for a "project-id".'
+  print 'NOTE 2: Enter 0 when asked for a "project-id".'
   print
   print '-----------------------------------------------------------------'
   print