Fix the author search for branches (only an issue on reverts), looking at trunk w/ the revision won't tell you

the correct author.
Review URL: http://codereview.chromium.org/505053

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@35009 0039d316-1c4b-4281-b951-d872f2087c98

drover.py

@@ -471,7 +471,7 @@ def main(options, args):
     revertExportRevision(url, revision)
 
   # Check the base url so we actually find the author who made the change
-  author = getAuthor(TRUNK_URL, revision)
+  author = getAuthor(url, revision)
 
   filename = str(revision)+".txt"
   out = open(filename,"w")