Allow to clear session and local storage when not backed on disk

content/browser/dom_storage/dom_storage_namespace.cc

 // Copyright 2013 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 "content/browser/dom_storage/dom_storage_namespace.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "content/browser/dom_storage/dom_storage_area.h"
@@ skipping 19 matching lines @@
     : namespace_id_(namespace_id),
       persistent_namespace_id_(persistent_namespace_id),
       task_runner_(task_runner),
       session_storage_database_(session_storage_database) {
   DCHECK_NE(kLocalStorageNamespaceId, namespace_id);
 }
 
 DOMStorageNamespace::~DOMStorageNamespace() {
 }
 
+void DOMStorageNamespace::ReadOrigins(std::vector<GURL>* origins) const {
+  origins->clear();
+  for (AreaMap::const_iterator it = areas_.begin(); it != areas_.end(); ++it)

[michaeln, 2016/05/05 00:38:23]

range based for loop please

for (const auto& entry : areas_)
  origins->push_back(entry.first);

[Julien Isorce Samsung, 2016/05/05 11:05:04]

Done.

+    origins->push_back(it->first);
+}
+
 DOMStorageArea* DOMStorageNamespace::OpenStorageArea(const GURL& origin) {
   if (AreaHolder* holder = GetAreaHolder(origin)) {
     ++(holder->open_count_);
     return holder->area_.get();
   }
   DOMStorageArea* area;
   if (namespace_id_ == kLocalStorageNamespaceId) {
     area = new DOMStorageArea(origin, directory_, task_runner_.get());
   } else {
     area = new DOMStorageArea(
@@ skipping 144 matching lines @@
     DOMStorageArea* area, int count)
     : area_(area), open_count_(count) {
 }
 
 DOMStorageNamespace::AreaHolder::AreaHolder(const AreaHolder& other) = default;
 
 DOMStorageNamespace::AreaHolder::~AreaHolder() {
 }
 
 }  // namespace content