Remove const std::string return by std::string

chrome/browser/browsing_data/cookies_tree_model.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/browsing_data/cookies_tree_model.h"
 
 #include <algorithm>
 #include <functional>
 #include <map>
 #include <vector>
@@ skipping 623 matching lines @@
                                               : url.host());
 }
 
 CookieTreeHostNode::CookieTreeHostNode(const GURL& url)
     : CookieTreeNode(TitleForUrl(url)),
       url_(url),
       canonicalized_host_(CanonicalizeHost(url)) {}
 
 CookieTreeHostNode::~CookieTreeHostNode() {}
 
-const std::string CookieTreeHostNode::GetHost() const {
+std::string CookieTreeHostNode::GetHost() const {
   const std::string file_origin_node_name(
       std::string(url::kFileScheme) + url::kStandardSchemeSeparator);
   return url_.SchemeIsFile() ? file_origin_node_name : url_.host();
 }
 
 CookieTreeNode::DetailedInfo CookieTreeHostNode::GetDetailedInfo() const {
   return DetailedInfo().InitHost();
 }
 
 CookieTreeCookiesNode* CookieTreeHostNode::GetOrCreateCookiesNode() {
@@ skipping 888 matching lines @@
 void CookiesTreeModel::MaybeNotifyBatchesEnded() {
   // Only notify the observers if this is the outermost call to EndBatch() if
   // called in a nested manner.
   if (batches_ended_ == batches_started_ &&
       batches_seen_ == batches_expected_) {
     FOR_EACH_OBSERVER(Observer,
                       cookies_observer_list_,
                       TreeModelEndBatch(this));
   }
 }