Implement HTMLMediaElement::srcObject.

Source/core/html/MediaProvider.h

 /*
  * Copyright (C) 2014 Google Inc. All rights reserved.

[sof, 2014/09/18 07:33:17]

Use a short copyright here also.

[perkj_chrome, 2014/09/18 14:47:09]

Done.

  *
  * 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
  *    notice, this list of conditions and the following disclaimer
  *    in the documentation and/or other materials provided with the
  *    distribution.
  * 3. Neither the name of Google Inc. nor the names of its contributors
  *    may be used to endorse or promote products derived from this
  *    software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  * 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 {

[sof, 2014/09/18 07:33:17]

Do you need to derive from WillBeGarbageCollectedMixin ? If so, add a public
virtual method

 virtual void trace(Visitor*) { }

and delegate to from the trace() method from any object that derives from
MediaProvider.

(For consistency, we prefer to define a trace() for all mixins.)

[perkj_chrome, 2014/09/18 14:47:09]

I do right? Since HTMLMediaElement must be able to keep a MediaStream alive if
its set as a srcObject.

+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() { };

[sof, 2014/09/18 07:33:17]

nit: remove ";"

[perkj_chrome, 2014/09/18 14:47:09]

Done.

 
-    m_queue.swap(remaining);
-}
+    virtual EventTarget* eventTarget() = 0;
+    virtual const String& getObjectUrl() = 0;
+};
 
 } // namespace blink
+
+#endif