Implement HTMLMediaElement::srcObject.

Source/core/html/MediaProvider.h

 /*
  * Copyright (C) 2014 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 10 matching lines @@
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#include "config.h"
-#include "core/dom/custom/CustomElementAsyncImportMicrotaskQueue.h"
+#ifndef MediaProvider_h
+#define MediaProvider_h
 
-#include "core/dom/custom/CustomElementMicrotaskImportStep.h"
+#include "platform/heap/Handle.h"
+#include "wtf/Functional.h"
 
 namespace blink {
 
-void CustomElementAsyncImportMicrotaskQueue::enqueue(PassOwnPtrWillBeRawPtr<CustomElementMicrotaskStep> step)
-{
-    m_queue.append(step);
-}
+class EventTarget;
+class MediaProvider;
+class ScriptValue;
 
-void CustomElementAsyncImportMicrotaskQueue::doDispatch()
-{
-    WillBeHeapVector<OwnPtrWillBeMember<CustomElementMicrotaskStep> > remaining;
+class MediaProvider : public WillBeGarbageCollectedMixin {
+public:
+    // Converter must be a static function and is used for converting between a ScriptValue and a MediaProvider instance.
+    // If the ScriptValue can not be converted to a MediaProvider, the function must return null.
+    typedef Function<MediaProvider*(const ScriptValue&)> Converter;
+    static MediaProvider* convert(const ScriptValue&);
 
-    for (unsigned i = 0; i < m_queue.size(); ++i) {
-        if (CustomElementMicrotaskStep::Processing == m_queue[i]->process())
-            remaining.append(m_queue[i].release());
-    }
+    MediaProvider(const String& interfaceName, const Converter&);
+    virtual ~MediaProvider() { };
 
-    m_queue.swap(remaining);
-}
+    virtual EventTarget* eventTarget() = 0;
+    virtual const String& getObjectUrl() = 0;
+};
 
 } // namespace blink
+
+#endif