Custom Elements: Encapsulates Async and Sync Queues into one class.

Source/core/dom/custom/CustomElementMicrotaskDispatcher.h

 // 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.
 
 #ifndef CustomElementMicrotaskDispatcher_h
 #define CustomElementMicrotaskDispatcher_h
 
 #include "platform/heap/Handle.h"
 #include "wtf/Noncopyable.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/Vector.h"
 
 namespace WebCore {
 
-class CustomElementAsyncImportMicrotaskQueue;
 class CustomElementCallbackQueue;
 class CustomElementMicrotaskImportStep;
-class CustomElementMicrotaskQueue;
 class CustomElementMicrotaskStep;
+class CustomElementMicrotaskStepDispatcher;
 class HTMLImportLoader;
 
 class CustomElementMicrotaskDispatcher FINAL : public NoBaseWillBeGarbageCollected<CustomElementMicrotaskDispatcher> {
     WTF_MAKE_NONCOPYABLE(CustomElementMicrotaskDispatcher);
     DECLARE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(CustomElementMicrotaskDispatcher);
 public:
     static CustomElementMicrotaskDispatcher& instance();
 
     void enqueue(HTMLImportLoader* parentLoader, PassOwnPtrWillBeRawPtr<CustomElementMicrotaskStep>);
     void enqueue(HTMLImportLoader* parentLoader, PassOwnPtrWillBeRawPtr<CustomElementMicrotaskImportStep>, bool importIsSync);
@@ skipping 21 matching lines @@
     static void dispatch();
     void doDispatch();
 
     bool m_hasScheduledMicrotask;
     enum {
         Quiescent,
         Resolving,
         DispatchingCallbacks
     } m_phase;
 
-    RefPtrWillBeMember<CustomElementMicrotaskQueue> m_resolutionAndImports;
-    RefPtrWillBeMember<CustomElementAsyncImportMicrotaskQueue> m_asyncImports;
+    RefPtrWillBeMember<CustomElementMicrotaskStepDispatcher> m_steps;
     WillBeHeapVector<RawPtrWillBeMember<CustomElementCallbackQueue> > m_elements;
 };
 
 }
 
 #if !defined(NDEBUG)
 void showCEMD();
 #endif
 
 #endif // CustomElementMicrotaskDispatcher_h