Add a pref name for share targets, and store their manifest data.

chrome/common/pref_names.cc

 // 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.
 
 #include "chrome/common/pref_names.h"
 
 #include "base/macros.h"
 #include "build/build_config.h"
 #include "chrome/common/features.h"
 #include "chrome/common/pref_font_webkit_names.h"
@@ skipping 2355 matching lines @@
 // Whether the metrics for the state of geolocation post-disclosure being shown
 // have been recorded.
 const char kSearchGeolocationPostDisclosureMetricsRecorded[] =
     "search_geolocation_post_disclosure_metrics_recorded";
 #endif
 
 // A dictionary which stores whether location access is enabled for the current
 // default search engine, if it is the Google search engine.
 const char kGoogleDSEGeolocationSetting[] = "google_dse_geolocation_setting";
 
+// A dictionary of manifest URLs of Web Share Targets to a dictionary containing
+// attributes of its share_target field found in its manifest. Each key in the
+// dictionary is the name of the attribute, and the value is the corresponding
+// value.
+const char kWebShareVisitedTargets[] = "profile.web_share.visited_targets";
+
 }  // namespace prefs