history: Move kBookmarkBarID constant out of HistoryService.

chrome/browser/history/history.cc

 // Copyright (c) 2011 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.
 
 // The history system runs on a background thread so that potentially slow
 // database operations don't delay the browser. This backend processing is
 // represented by HistoryBackend. The HistoryService's job is to dispatch to
 // that thread.
 //
 // Main thread                       History thread
@@ skipping 98 matching lines @@
   virtual void StartTopSitesMigration() OVERRIDE {
     message_loop_->PostTask(FROM_HERE, NewRunnableMethod(history_service_.get(),
         &HistoryService::StartTopSitesMigration));
   }
 
  private:
   scoped_refptr<HistoryService> history_service_;
   MessageLoop* message_loop_;
 };
 
-// static
-const history::StarID HistoryService::kBookmarkBarID = 1;
-
 // The history thread is intentionally not a BrowserThread because the
 // sync integration unit tests depend on being able to create more than one
 // history thread.
 HistoryService::HistoryService()
     : thread_(new base::Thread(kHistoryThreadName)),
       profile_(NULL),
       backend_loaded_(false),
       bookmark_service_(NULL),
       no_db_(false),
       needs_top_sites_migration_(false) {
@@ skipping 678 matching lines @@
     history::TopSites* ts = profile_->GetTopSitesWithoutCreating();
     if (ts)
       ts->MigrateFromHistory();
   }
 }
 
 void HistoryService::OnTopSitesReady() {
   ScheduleAndForget(PRIORITY_NORMAL,
                     &HistoryBackend::MigrateThumbnailsDatabase);
 }