Clean up a few more unused globals.

chrome/browser/extensions/api/history/history_api.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/browser/extensions/api/history/history_api.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/command_line.h"
@@ skipping 39 matching lines @@
 namespace DeleteUrl = api::history::DeleteUrl;
 namespace DeleteRange = api::history::DeleteRange;
 namespace GetMostVisited = api::experimental_history::GetMostVisited;
 namespace GetVisits = api::history::GetVisits;
 namespace OnVisited = api::history::OnVisited;
 namespace OnVisitRemoved = api::history::OnVisitRemoved;
 namespace Search = api::history::Search;
 
 namespace {
 
-const char kInvalidIdError[] = "History item id is invalid.";
 const char kInvalidUrlError[] = "Url is invalid.";
 const char kDeleteProhibitedError[] = "Browsing history is not allowed to be "
                                       "deleted.";
 
 double MilliSecondsFromTime(const base::Time& time) {
   return 1000 * time.ToDoubleT();
 }
 
 scoped_ptr<HistoryItem> GetHistoryItem(const history::URLRow& row) {
   scoped_ptr<HistoryItem> history_item(new HistoryItem());
@@ skipping 458 matching lines @@
   }
 
   return true;
 }
 
 void HistoryDeleteAllFunction::DeleteComplete() {
   SendAsyncResponse();
 }
 
 }  // namespace extensions