Cleanup in webkit/glue/

webkit/glue/back_forward_list_client_impl.cc

 // Copyright (c) 2008 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 "config.h"
 
 #include "HistoryItem.h"
 #undef LOG
 
 #include "webkit/glue/back_forward_list_client_impl.h"
 #include "webkit/glue/webhistoryitem_impl.h"
 #include "webkit/glue/webview_impl.h"
 
 namespace webkit_glue {
 
 BackForwardListClientImpl::BackForwardListClientImpl(WebViewImpl* webview)
     : webview_(webview) {
 }
 
 BackForwardListClientImpl::~BackForwardListClientImpl() {
 }
 
 void BackForwardListClientImpl::SetCurrentHistoryItem(
     WebCore::HistoryItem* item) {
   previous_item_ = current_item_;
   current_item_ = item;
 }
 
-WebCore::HistoryItem* BackForwardListClientImpl::GetPreviousHistoryItem() {
+WebCore::HistoryItem* BackForwardListClientImpl::GetPreviousHistoryItem()
+    const {
   return previous_item_.get();
 }
 
 void BackForwardListClientImpl::addItem(PassRefPtr<WebCore::HistoryItem> item) {
   previous_item_ = current_item_;
   current_item_ = item;
 
   // If WebCore adds a new HistoryItem, it means this is a new navigation (ie,
   // not a reload or back/forward).
   webview_->ObserveNewNavigation();
@@ skipping 49 matching lines @@
   return webview_->delegate()->GetHistoryForwardListCount();
 }
 
 void BackForwardListClientImpl::close() {
   current_item_ = NULL;
   previous_item_ = NULL;
   pending_history_item_ = NULL;
 }
 
 } // namespace webkit_glue