Fix AffectedFile.IsDirectory() to use the right path.

BUG=gcl commit doesn't show any "svn: 'bleh' is not a working copy" error
R=jam

Review URL: http://codereview.chromium.org/113782

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@16781 0039d316-1c4b-4281-b951-d872f2087c98

presubmit_support.py

@@ -346,13 +346,14 @@ class AffectedFile(object):
 
   def IsDirectory(self):
     """Returns true if this object is a directory."""
-    if os.path.exists(self.path):
+    path = self.AbsoluteLocalPath()
+    if os.path.exists(path):
       # Retrieve directly from the file system; it is much faster than querying
       # subversion, especially on Windows.
-      return os.path.isdir(self.path)
+      return os.path.isdir(path)
     else:
-      return gclient.CaptureSVNInfo(self.path).get('Node Kind') in ('dir',
-                                                                    'directory')
+      return gclient.CaptureSVNInfo(path).get('Node Kind') in ('dir',
+                                                               'directory')
 
   def SvnProperty(self, property_name):
     """Returns the specified SVN property of this file, or the empty string