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

webkit/dom_storage/dom_storage_context.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_context.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/file_util.h"
 #include "base/guid.h"
@@ skipping 93 matching lines @@
       infos->push_back(info);
     }
   }
   // TODO(marja): Get usage infos for sessionStorage (crbug.com/123599).
 }
 
 void DomStorageContext::DeleteOrigin(const GURL& origin) {
   DCHECK(!is_shutdown_);
   DomStorageNamespace* local = GetStorageNamespace(kLocalStorageNamespaceId);
   local->DeleteOrigin(origin);
+  // Synthesize a 'cleared' event if the area is open so CachedAreas in
+  // renderers get emptied out too.
+  DomStorageArea* area = local->GetOpenStorageArea(origin);
+  if (area)
+    NotifyAreaCleared(area, origin);
 }
 
 void DomStorageContext::PurgeMemory() {
   // We can only purge memory from the local storage namespace
   // which is backed by disk.
   StorageNamespaceMap::iterator found =
       namespaces_.find(kLocalStorageNamespaceId);
   if (found != namespaces_.end())
     found->second->PurgeMemory();
 }
@@ skipping 237 matching lines @@
   if (!deletable_persistent_namespace_ids_.empty()) {
     task_runner_->PostDelayedTask(
         FROM_HERE, base::Bind(
             &DomStorageContext::DeleteNextUnusedNamespace,
             this),
         base::TimeDelta::FromSeconds(kSessionStoraceScavengingSeconds));
   }
 }
 
 }  // namespace dom_storage