Add full_move flag to GIT.GenerateDiff and Factor out FindGclientRootDir into gclient_utils.

trychange.py

 #!/usr/bin/python
 # Copyright (c) 2009 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.
 """Client-side script to send a try job to the try server. It communicates to
 the try server by either writting to a svn repository or by directly connecting
 to the server by HTTP.
 """
 
 import datetime
@@ skipping 114 matching lines @@
       except (IOError, OSError):
         return None
 
 
 class GIT(SCM):
   """Gathers the options and diff for a git checkout."""
   def __init__(self, *args, **kwargs):
     SCM.__init__(self, *args, **kwargs)
     self.checkout_root = scm.GIT.GetCheckoutRoot(os.getcwd())
     if not self.options.diff:
-      self.options.diff = scm.GIT.GenerateDiff(self.checkout_root)
+      self.options.diff = scm.GIT.GenerateDiff(self.checkout_root,
+                                               full_move=True)
     if not self.options.name:
       self.options.name = scm.GIT.GetPatchName(self.checkout_root)
     if not self.options.email:
       self.options.email = scm.GIT.GetEmail(self.checkout_root)
 
   def GetLocalRoot(self):
     """Return the path of the repository root."""
     return self.checkout_root
 
   def GetBots(self):
@@ skipping 332 matching lines @@
   except (InvalidScript, NoTryServerAccess), e:
     if swallow_exception:
       return 1
     print e
     return 1
   return 0
 
 
 if __name__ == "__main__":
   sys.exit(TryChange(None, [], False))