Rename presubmit.py to presubmit_support.py to reduce confusion and be able to add a PRESUBMIT.py check into depot_tools.

Review URL: http://codereview.chromium.org/113337

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@15954 0039d316-1c4b-4281-b951-d872f2087c98

gcl.py

@@ -987,12 +987,12 @@ def Lint(change_info, args):
 def DoPresubmitChecks(change_info, committing):
   """Imports presubmit, then calls presubmit.DoPresubmitChecks."""
   # Need to import here to avoid circular dependency.
-  import presubmit
-  result = presubmit.DoPresubmitChecks(change_info,
-                                       committing,
-                                       verbose=False,
-                                       output_stream=sys.stdout,
-                                       input_stream=sys.stdin)
+  import presubmit_support
+  result = presubmit_support.DoPresubmitChecks(change_info,
+                                               committing,
+                                               verbose=False,
+                                               output_stream=sys.stdout,
+                                               input_stream=sys.stdin)
   if not result:
     print "\nPresubmit errors, can't continue (use --no_presubmit to bypass)"
   return result

tests/presubmit_unittest.py

@@ -12,7 +12,7 @@ import unittest
 # Local imports
 import gcl
 import gclient
-import presubmit
+import presubmit_support as presubmit
 import presubmit_canned_checks