Introducing the WebServiceWorkerCacheStorage

Source/modules/serviceworkers/FetchStores.idl

Index: Source/modules/serviceworkers/FetchStores.idl
diff --git a/Source/modules/serviceworkers/FetchStores.idl b/Source/modules/serviceworkers/FetchStores.idl
new file mode 100644
index 0000000000000000000000000000000000000000..7568c622f1c261860b9ef39e381da399dc01752b
--- /dev/null
+++ b/Source/modules/serviceworkers/FetchStores.idl
@@ -0,0 +1,19 @@
+// Copyright 2014 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.
+
+[
+    WillBeGarbageCollected,
+    NoInterfaceObject,
+    Exposed=ServiceWorker,
+    RuntimeEnabled=ServiceWorker,
+] interface FetchStores {
+  [CallWith=ScriptState] Promise get(ScalarValueString fetchStoreName);
+  [CallWith=ScriptState] Promise has(ScalarValueString fetchStoreName);
+  [CallWith=ScriptState, ImplementedAs=createFunction] Promise create(ScalarValueString fetchStoreName);
+  [CallWith=ScriptState, ImplementedAs=deleteFunction] Promise delete(ScalarValueString fetchStoreName);
+  [CallWith=ScriptState] Promise keys();
+  // FIXME: From https://github.com/slightlyoff/ServiceWorker/issues/372 and the updated
+  // https://slightlyoff.github.io/ServiceWorker/spec/service_worker/index.html#cache-storage ,
+  // we have yet to implement match().
+};