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

Review URL: https://chromiumcodereview.appspot.com/10910045

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@155284 0039d316-1c4b-4281-b951-d872f2087c98

webkit/dom_storage/OWNERS

@@ -1 +1,2 @@
 michaeln@chromium.org
+marja@chromium.org

webkit/dom_storage/dom_storage_context.cc

@@ -111,6 +111,11 @@ 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() {

webkit/dom_storage/dom_storage_namespace.cc

@@ -63,6 +63,13 @@ void DomStorageNamespace::CloseStorageArea(DomStorageArea* area) {
   // 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) {

webkit/dom_storage/dom_storage_namespace.h

@@ -47,6 +47,9 @@ class DomStorageNamespace
   DomStorageArea* OpenStorageArea(const GURL& origin);
   void CloseStorageArea(DomStorageArea* area);
 
+  // Returns the area for |origin| if it's open, otherwise NULL.
+  DomStorageArea* GetOpenStorageArea(const GURL& origin);
+
   // Creates a clone of |this| namespace including
   // shallow copies of all contained areas.
   // Should only be called for session storage namespaces.