DomStorage: Clear the renderer side cache too when the user clears browsing data.

webkit/dom_storage/dom_storage_namespace.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 "webkit/dom_storage/dom_storage_namespace.h"
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/logging.h"
@@ skipping 45 matching lines @@
 
 void DomStorageNamespace::CloseStorageArea(DomStorageArea* area) {
   AreaHolder* holder = GetAreaHolder(area->origin());
   DCHECK(holder);
   DCHECK_EQ(holder->area_.get(), area);
   --(holder->open_count_);
   // TODO(michaeln): Clean up areas that aren't needed in memory anymore.
   // The in-process-webkit based impl didn't do this either, but would be nice.
 }
 
+DomStorageArea* DomStorageNamespace::GetOpenStorageArea(const GURL& origin) {
+  AreaHolder* holder = GetAreaHolder(origin);
+  if (holder && holder->open_count_)
+    return holder->area_;
+  return NULL;
+}
+
 DomStorageNamespace* DomStorageNamespace::Clone(
     int64 clone_namespace_id,
     const std::string& clone_persistent_namespace_id) {
   DCHECK_NE(kLocalStorageNamespaceId, namespace_id_);
   DCHECK_NE(kLocalStorageNamespaceId, clone_namespace_id);
   DomStorageNamespace* clone = new DomStorageNamespace(
       clone_namespace_id, clone_persistent_namespace_id,
       session_storage_database_, task_runner_);
   AreaMap::const_iterator it = areas_.begin();
   // Clone the in-memory structures.
@@ skipping 76 matching lines @@
 
 DomStorageNamespace::AreaHolder::AreaHolder(
     DomStorageArea* area, int count)
     : area_(area), open_count_(count) {
 }
 
 DomStorageNamespace::AreaHolder::~AreaHolder() {
 }
 
 }  // namespace dom_storage