Certificate Transparency: Start tracking logs' state

components/certificate_transparency.gypi

 # Copyright 2015 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.
 
 {
   'targets': [
     {
       # GN version: //components/certificate_transparency
       'target_name': 'certificate_transparency',
       'type': 'static_library',
       'include_dirs': [
         '..',
       ],
       'dependencies': [
         '../base/base.gyp:base',
         '../components/components.gyp:safe_json',
         '../net/net.gyp:net',
         '../url/url.gyp:url_lib',
       ],
       'sources': [
         'certificate_transparency/log_proof_fetcher.h',
         'certificate_transparency/log_proof_fetcher.cc',
+        'certificate_transparency/single_tree_tracker.cc',
+        'certificate_transparency/single_tree_tracker.h',
+        'certificate_transparency/tree_state_tracker.h',
+        'certificate_transparency/tree_state_tracker.cc',
       ],
     }
   ],
 }