Add the HasAreaOpen method to DomStorageHost. Intended for use to make event...

Add the HasAreaOpen method to DomStorageHost. Intended for use to make event propagation less chatty.

BUG=128482
Review URL: https://chromiumcodereview.appspot.com/10413018

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@138158 0039d316-1c4b-4281-b951-d872f2087c98

webkit/dom_storage/dom_storage_host.cc

@@ -115,6 +115,18 @@ bool DomStorageHost::ClearArea(int connection_id, const GURL& page_url) {
   return true;
 }
 
+bool DomStorageHost::HasAreaOpen(
+    int namespace_id, const GURL& origin) const {
+  AreaMap::const_iterator it = connections_.begin();
+  for (; it != connections_.end(); ++it) {
+    if (namespace_id == it->second.namespace_->namespace_id() &&
+        origin == it->second.area_->origin()) {
+      return true;
+    }
+  }
+  return false;
+}
+
 DomStorageArea* DomStorageHost::GetOpenArea(int connection_id) {
   AreaMap::iterator found = connections_.find(connection_id);
   if (found == connections_.end())

webkit/dom_storage/dom_storage_host.h

@@ -46,6 +46,7 @@ class DomStorageHost {
                   const GURL& page_url,
                   string16* old_value);
   bool ClearArea(int connection_id, const GURL& page_url);
+  bool HasAreaOpen(int namespace_id, const GURL& origin) const;
 
  private:
   // Struct to hold references needed for areas that are open