[POC] Implement "module responses map" concept

third_party/WebKit/Source/core/workers/Worklet.h

 // Copyright 2016 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.
 
 #ifndef Worklet_h
 #define Worklet_h
 
 #include "bindings/core/v8/ScriptPromise.h"
 #include "core/CoreExport.h"
 #include "core/dom/ContextLifecycleObserver.h"
 #include "core/workers/WorkletGlobalScopeProxy.h"
+#include "core/workers/WorkletModuleResponsesMap.h"
 #include "core/workers/WorkletOptions.h"
 #include "platform/bindings/ScriptWrappable.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
 class LocalFrame;
 class ScriptPromiseResolver;
 
 // This is the base implementation of Worklet interface defined in the spec:
@@ skipping 42 matching lines @@
   // necessary. CreateGlobalScope() will be called in that case. Each worklet
   // can define how to pool global scopes here.
   virtual bool NeedsToCreateGlobalScope() = 0;
   virtual WorkletGlobalScopeProxy* CreateGlobalScope() = 0;
 
   // "A Worklet has a list of the worklet's WorkletGlobalScopes. Initially this
   // list is empty; it is populated when the user agent chooses to create its
   // WorkletGlobalScope."
   // https://drafts.css-houdini.org/worklets/#worklet-section
   HeapHashSet<Member<WorkletGlobalScopeProxy>> proxies_;
+
+  // "A Worklet has a module responses map. This is a ordered map of module URLs
+  // to values that are a fetch responses. The map's entries are ordered based
+  // on their insertion order. Access to this map should be thread-safe."
+  // https://drafts.css-houdini.org/worklets/#module-responses-map
+  Member<WorkletModuleResponsesMap> module_responses_map_;
 };
 
 }  // namespace blink
 
 #endif  // Worklet_h