[Sync] - In about:sync page display if the first sync after restart has taken place or not.

chrome/browser/sync/internal_api/sync_manager.h

 // 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.
 
 #ifndef CHROME_BROWSER_SYNC_INTERNAL_API_SYNC_MANAGER_H_
 #define CHROME_BROWSER_SYNC_INTERNAL_API_SYNC_MANAGER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 76 matching lines @@
   // Status encapsulates detailed state about the internals of the SyncManager.
   struct Status {
     // Summary is a distilled set of important information that the end-user may
     // wish to be informed about (through UI, for example). Note that if a
     // summary state requires user interaction (such as auth failures), more
     // detailed information may be contained in additional status fields.
     enum Summary {
       // The internal instance is in an unrecognizable state. This should not
       // happen.
       INVALID = 0,
+      // A sync has not happened since restart.
+      UNINITIALIZED,
       // Can't connect to server, but there are no pending changes in
       // our local cache.
       OFFLINE,
       // Can't connect to server, and there are pending changes in our
       // local cache.
       OFFLINE_UNSYNCED,
       // Connected and syncing.
       SYNCING,
       // Connected, no pending changes.
       READY,
@@ skipping 42 matching lines @@
     int tombstone_updates_received;
 
     // Total number of overwrites due to conflict resolver since browser start.
     int num_local_overwrites_total;
     int num_server_overwrites_total;
 
     // Count of empty and non empty getupdates;
     int nonempty_get_updates;
     int empty_get_updates;
 
+    // Number of sync cycles.
+    int sync_count;
+
     // Count of useless and useful syncs we perform.
     int useless_sync_cycles;
     int useful_sync_cycles;
 
     // Encryption related.
     syncable::ModelTypeSet encrypted_types;
     bool cryptographer_ready;
     bool crypto_has_pending_keys;
 
     // The unique identifer for this client.
@@ skipping 448 matching lines @@
 syncable::ModelTypeSet GetTypesWithEmptyProgressMarkerToken(
     syncable::ModelTypeSet types,
     sync_api::UserShare* share);
 
 // Returns the string representation of a PassphraseRequiredReason value.
 std::string PassphraseRequiredReasonToString(PassphraseRequiredReason reason);
 
 }  // namespace sync_api
 
 #endif  // CHROME_BROWSER_SYNC_INTERNAL_API_SYNC_MANAGER_H_