Make it clear what last_sync_timestamp actually tracks. Update

chrome/browser/sync/sessions/status_controller.cc

 // Copyright (c) 2009 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/browser/sync/sessions/status_controller.h"
 
 #include "base/basictypes.h"
 
 namespace browser_sync {
 namespace sessions {
@@ skipping 63 matching lines @@
   set_num_consecutive_transient_error_commits(
       shared_.error_counters.value().consecutive_transient_error_commits +
       value);
 }
 
 void StatusController::set_num_consecutive_errors(int value) {
   if (shared_.error_counters.value().consecutive_errors != value)
     shared_.error_counters.mutate()->consecutive_errors = value;
 }
 
-void StatusController::set_got_new_timestamp() {
-  shared_.control_params.got_new_timestamp = true;
-}
-
 void StatusController::set_current_sync_timestamp(syncable::ModelType model,
                                                   int64 current_timestamp) {
   PerModelTypeState* state = GetOrCreateModelTypeState(false, model);
   if (current_timestamp > state->current_sync_timestamp.value())
     *(state->current_sync_timestamp.mutate()) = current_timestamp;
 }
 
 void StatusController::set_num_server_changes_remaining(
     int64 changes_remaining) {
   if (shared_.num_server_changes_remaining.value() != changes_remaining)
@@ skipping 115 matching lines @@
     per_model_group_.begin();
   int sum = 0;
   for (; it != per_model_group_.end(); ++it) {
     sum += it->second->conflict_progress.ConflictingItemsSize();
   }
   return sum;
 }
 
 }  // namespace sessions
 }  // namespace browser_sync