Add font substitution metric for Linux

tools/metrics/actions/extract_actions.py

 #!/usr/bin/env python
 #
 # Copyright (c) 2012 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.
 
 """Extract UserMetrics "actions" strings from the Chrome source.
 
 This program generates the list of known actions we expect to see in the
 user behavior logs.  It walks the Chrome source, looking for calls to
@@ skipping 184 matching lines @@
     actions.add('LanguageOptions_UiLanguageChange_%s' % language_code)
     actions.add('LanguageOptions_SpellCheckLanguageChange_%s' % language_code)
 
 
 def AddPDFPluginActions(actions):
   """Add actions that are sent by the PDF plugin.
 
   Arguments
     actions: set of actions to add to.
   """
+  actions.add('PDF.FontSubstituted')
   actions.add('PDF.LoadFailure')
   actions.add('PDF.LoadSuccess')
   actions.add('PDF.PreviewDocumentLoadFailure')
   actions.add('PDF.PrintPage')
   actions.add('PDF.ZoomFromBrowser')
   actions.add('PDF_Unsupported_3D')
   actions.add('PDF_Unsupported_Attachment')
   actions.add('PDF_Unsupported_Bookmarks')
   actions.add('PDF_Unsupported_Digital_Signature')
   actions.add('PDF_Unsupported_Movie')
@@ skipping 521 matching lines @@
 
   return PrettyPrint(actions, actions_dict, comment_nodes)
 
 
 def main(argv):
   presubmit_util.DoPresubmitMain(argv, 'actions.xml', 'actions.old.xml',
                                  'extract_actions.py', UpdateXml)
 
 if '__main__' == __name__:
   sys.exit(main(sys.argv))