Chromium build failed with heap leak checker, or configured with 'gyp_chromiu...

chrome/browser/cookies_tree_model.cc

 // Copyright (c) 2010 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/cookies_tree_model.h"
 
 #include <algorithm>
 #include <functional>
 #include <vector>
 
@@ skipping 555 matching lines @@
 }
 
 // Returns the index of the icon to use for |node|. Return -1 to use the
 // default icon. The index is relative to the list of icons returned from
 // GetIcons.
 int CookiesTreeModel::GetIconIndex(TreeModelNode* node) {
   CookieTreeNode* ct_node = static_cast<CookieTreeNode*>(node);
   switch (ct_node->GetDetailedInfo().node_type) {
     case CookieTreeNode::DetailedInfo::TYPE_ORIGIN:
       return ORIGIN;
-      break;
     case CookieTreeNode::DetailedInfo::TYPE_COOKIE:
       return COOKIE;
-      break;
     case CookieTreeNode::DetailedInfo::TYPE_DATABASE:
       return DATABASE;
-      break;
     case CookieTreeNode::DetailedInfo::TYPE_LOCAL_STORAGE:
       return DATABASE;  // close enough
-      break;
     case CookieTreeNode::DetailedInfo::TYPE_SESSION_STORAGE:
       return DATABASE;  // ditto
-      break;
     case CookieTreeNode::DetailedInfo::TYPE_APPCACHE:
       return DATABASE;  // ditto
-      break;
     case CookieTreeNode::DetailedInfo::TYPE_INDEXED_DB:
       return DATABASE;  // ditto
+    default:
       break;
-    default:
-      return -1;
   }
+  return -1;
 }
 
 void CookiesTreeModel::LoadCookies() {
   LoadCookiesWithFilter(std::wstring());
 }
 
 void CookiesTreeModel::LoadCookiesWithFilter(const std::wstring& filter) {
   // mmargh mmargh mmargh!
 
   all_cookies_ = cookie_monster_->GetAllCookies();
@@ skipping 250 matching lines @@
 
 void CookiesTreeModel::NotifyObserverEndBatch() {
   // Only notify the observers if this is the outermost call to EndBatch() if
   // called in a nested manner.
   if (--batch_update_ == 0) {
     FOR_EACH_OBSERVER(Observer,
                       cookies_observer_list_,
                       TreeModelEndBatch(this));
   }
 }