diff -r 000000000000 -r 6474c204b198 dom/datastore/DataStore.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/datastore/DataStore.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,188 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/dom/DataStore.h"
+#include "mozilla/dom/DataStoreCursor.h"
+#include "mozilla/dom/DataStoreBinding.h"
+#include "mozilla/dom/DataStoreImplBinding.h"
+#include "mozilla/dom/Navigator.h"
+#include "mozilla/dom/Promise.h"
+#include "mozilla/ErrorResult.h"
+#include "mozilla/Preferences.h"
+#include "AccessCheck.h"
+
+namespace mozilla {
+namespace dom {
+
+NS_IMPL_ADDREF_INHERITED(DataStore, DOMEventTargetHelper)
+NS_IMPL_RELEASE_INHERITED(DataStore, DOMEventTargetHelper)
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(DataStore)
+  NS_INTERFACE_MAP_ENTRY(nsISupports)
+NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
+
+NS_IMPL_CYCLE_COLLECTION(DataStore, mStore)
+
+DataStore::DataStore(nsPIDOMWindow* aWindow)
+  : DOMEventTargetHelper(aWindow)
+{
+}
+
+already_AddRefed<DataStore>
+DataStore::Constructor(GlobalObject& aGlobal, ErrorResult& aRv)
+{
+  nsCOMPtr<nsPIDOMWindow> window = do_QueryInterface(aGlobal.GetAsSupports());
+  if (!window) {
+    aRv.Throw(NS_ERROR_FAILURE);
+    return nullptr;
+  }
+
+  nsRefPtr<DataStore> store = new DataStore(window);
+  return store.forget();
+}
+
+JSObject*
+DataStore::WrapObject(JSContext* aCx)
+{
+  return DataStoreBinding::Wrap(aCx, this);
+}
+
+/*static*/ bool
+DataStore::EnabledForScope(JSContext* aCx, JS::Handle<JSObject*> aObj)
+{
+  // Only expose the interface when it is:
+  // 1. enabled by the preference and
+  // 2. accessed by the chrome codes in Gecko.
+  return (Navigator::HasDataStoreSupport(aCx, aObj) &&
+          nsContentUtils::ThreadsafeIsCallerChrome());
+}
+
+void
+DataStore::GetName(nsAString& aName, ErrorResult& aRv)
+{
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(mStore);
+
+  nsAutoString name;
+  mStore->GetName(name, aRv);
+  aName.Assign(name);
+}
+
+void
+DataStore::GetOwner(nsAString& aOwner, ErrorResult& aRv)
+{
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(mStore);
+
+  nsAutoString owner;
+  mStore->GetOwner(owner, aRv);
+  aOwner.Assign(owner);
+}
+
+bool
+DataStore::GetReadOnly(ErrorResult& aRv)
+{
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(mStore);
+
+  return mStore->GetReadOnly(aRv);
+}
+
+already_AddRefed<Promise>
+DataStore::Get(const Sequence<OwningStringOrUnsignedLong>& aId,
+               ErrorResult& aRv)
+{
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(mStore);
+
+  return mStore->Get(aId, aRv);
+}
+
+already_AddRefed<Promise>
+DataStore::Put(JSContext* aCx,
+               JS::Handle<JS::Value> aObj,
+               const StringOrUnsignedLong& aId,
+               const nsAString& aRevisionId,
+               ErrorResult& aRv)
+{
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(mStore);
+
+  return mStore->Put(aObj, aId, aRevisionId, aRv);
+}
+
+already_AddRefed<Promise>
+DataStore::Add(JSContext* aCx,
+               JS::Handle<JS::Value> aObj,
+               const Optional<StringOrUnsignedLong>& aId,
+               const nsAString& aRevisionId,
+               ErrorResult& aRv)
+{
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(mStore);
+
+  return mStore->Add(aObj, aId, aRevisionId, aRv);
+}
+
+already_AddRefed<Promise>
+DataStore::Remove(const StringOrUnsignedLong& aId,
+                  const nsAString& aRevisionId,
+                  ErrorResult& aRv)
+{
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(mStore);
+
+  return mStore->Remove(aId, aRevisionId, aRv);
+}
+
+already_AddRefed<Promise>
+DataStore::Clear(const nsAString& aRevisionId, ErrorResult& aRv)
+{
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(mStore);
+
+  return mStore->Clear(aRevisionId, aRv);
+}
+
+void
+DataStore::GetRevisionId(nsAString& aRevisionId, ErrorResult& aRv)
+{
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(mStore);
+
+  nsAutoString revisionId;
+  mStore->GetRevisionId(revisionId, aRv);
+  aRevisionId.Assign(revisionId);
+}
+
+already_AddRefed<Promise>
+DataStore::GetLength(ErrorResult& aRv)
+{
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(mStore);
+
+  return mStore->GetLength(aRv);
+}
+
+already_AddRefed<DataStoreCursor>
+DataStore::Sync(const nsAString& aRevisionId, ErrorResult& aRv)
+{
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(mStore);
+
+  return mStore->Sync(aRevisionId, aRv);
+}
+
+void
+DataStore::SetDataStoreImpl(DataStoreImpl& aStore, ErrorResult& aRv)
+{
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(!mStore);
+
+  mStore = &aStore;
+  mStore->SetEventTarget(*this, aRv);
+}
+
+} //namespace dom
+} //namespace mozilla
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