[DONT COMMIT] Worklet: Implement "addModule()" algorithm for main thread worklets

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

Index: third_party/WebKit/Source/core/workers/MainThreadWorklet.h
diff --git a/third_party/WebKit/Source/core/workers/MainThreadWorklet.h b/third_party/WebKit/Source/core/workers/MainThreadWorklet.h
index 07845f3601f7382c8013ed505257f37221a63060..76d8634909ed0dd2cb350a432354197068b5c3a6 100644
--- a/third_party/WebKit/Source/core/workers/MainThreadWorklet.h
+++ b/third_party/WebKit/Source/core/workers/MainThreadWorklet.h
@@ -15,6 +15,7 @@
 namespace blink {
 
 class LocalFrame;
+class WorkletGlobalScopeProxy;
 
 // A MainThreadWorklet is a worklet that runs only on the main thread.
 // TODO(nhiroki): This is a temporary class to support module loading for main
@@ -42,9 +43,18 @@ class CORE_EXPORT MainThreadWorklet : public Worklet,
  protected:
   explicit MainThreadWorklet(LocalFrame*);
 
+  virtual void CreateWorkletGlobalScope();
+
+  // "A Worklet has a list of the worklet's WorkletGlobalScopes. Initially this

[kouhei (in TOK), 2017/04/25 11:55:18]

Provide link to the spec

+  // list is empty; it is populated when the user agent chooses to create its
+  // WorkletGlobalScope."
+  WTF::HashSet<std::unique_ptr<WorkletGlobalScopeProxy>> global_scope_proxies_;
+
  private:
-  HeapHashMap<int32_t /* request_id */, Member<ScriptPromiseResolver>>
-      resolver_map_;
+  struct PendingTasks;
+  // TODO(nhiroki): We could replace |request_id| with |url|.
+  HeapHashMap<int32_t /* request_id */, Member<PendingTasks>>
+      pending_tasks_map_;
 };
 
 }  // namespace blink