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

chrome/browser/sync/sessions/session_state.cc

Index: chrome/browser/sync/sessions/session_state.cc
diff --git a/chrome/browser/sync/sessions/session_state.cc b/chrome/browser/sync/sessions/session_state.cc
index d9392f2bfa4c667ffef9090cf31d9d33b1da7d11..5bf0fab3185424886db532954a0565dc2c3bc2e6 100644
--- a/chrome/browser/sync/sessions/session_state.cc
+++ b/chrome/browser/sync/sessions/session_state.cc
@@ -112,7 +112,6 @@ SyncSessionSnapshot::SyncSessionSnapshot(
     const SyncerStatus& syncer_status,
     const ErrorCounters& errors,
     int64 num_server_changes_remaining,
-    bool is_share_usable,
     syncable::ModelTypeSet initial_sync_ended,
     const std::string
         (&download_progress_markers)[syncable::MODEL_TYPE_COUNT],
@@ -129,7 +128,6 @@ SyncSessionSnapshot::SyncSessionSnapshot(
     : syncer_status(syncer_status),
       errors(errors),
       num_server_changes_remaining(num_server_changes_remaining),
-      is_share_usable(is_share_usable),
       initial_sync_ended(initial_sync_ended),
       download_progress_markers(),
       has_more_to_sync(more_to_sync),
@@ -158,7 +156,6 @@ DictionaryValue* SyncSessionSnapshot::ToValue() const {
   // We don't care too much if we lose precision here.
   value->SetInteger("numServerChangesRemaining",
                     static_cast<int>(num_server_changes_remaining));
-  value->SetBoolean("isShareUsable", is_share_usable);
   value->Set("initialSyncEnded",
              syncable::ModelTypeSetToValue(initial_sync_ended));
   value->Set("downloadProgressMarkers",