Make .ycm_extra_conf.py work for files in

third_party/leveldatabase

The subroutine for finding chromium's root was looking for a
directory that contained "src" and either "src/.git" or
".gclient". This unfortunately matches
third_party/leveldatabase.

This patch adds a check for src/DEPS as well.

BUG=
NOTRY=true

Review URL: https://chromiumcodereview.appspot.com/15225002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@200815 0039d316-1c4b-4281-b951-d872f2087c98

tools/vim/chromium.ycm_extra_conf.py

@@ -66,7 +66,7 @@ def FindChromeSrcFromFilename(filename):
     (String) Path of 'src/', or None if unable to find.
   """
   curdir = os.path.normpath(os.path.dirname(filename))
-  while not (PathExists(curdir, 'src')
+  while not (PathExists(curdir, 'src') and PathExists(curdir, 'src', 'DEPS')
              and (PathExists(curdir, '.gclient')
                   or PathExists(curdir, 'src', '.git'))):
     nextdir = os.path.normpath(os.path.join(curdir, '..'))