MSE: Implement TrackDefaultList object

Source/modules/mediasource/TrackDefaultList.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 TrackDefaultList_h
+#define TrackDefaultList_h
+
+#include "bindings/core/v8/ScriptWrappable.h"
+#include "modules/mediasource/TrackDefault.h"
+#include "platform/heap/Handle.h"
+
+namespace blink {
+
+class ExceptionState;
+
+class TrackDefaultList final : public GarbageCollectedFinalized<TrackDefaultList>, public ScriptWrappable {
+    DEFINE_WRAPPERTYPEINFO();
+public:
+    static TrackDefaultList* create(const Vector<TrackDefault>& trackDefaults, ExceptionState& exceptionState)
+    {
+        return new TrackDefaultList(trackDefaults, exceptionState);
+    }
+
+    virtual ~TrackDefaultList() { }
+
+    // Implement the IDL
+    unsigned long length() const { return m_trackDefaults.size(); }

[philipj_slow, 2014/11/14 12:12:27]

Just unsigned, see https://codereview.chromium.org/721053002

[wolenetz, 2014/12/03 01:09:56]

Done, and done for item(), too. Thanks for pointing this out. I found a similar
occurrence in core/html/MediaKeyError (following-up separately).

+    TrackDefault* item(unsigned long) const;
+
+    void trace(Visitor* visitor) { visitor->trace(m_trackDefaults); }
+
+private:
+    TrackDefaultList(const Vector<TrackDefault>&, ExceptionState&);
+
+    HeapVector<Member<TrackDefault> > m_trackDefaults;

[philipj_slow, 2014/11/14 12:12:27]

The extra space in nested templates is no longer required:
https://chromium-cpp.appspot.com

[wolenetz, 2014/12/03 01:09:56]

Done.

+};
+
+} // namespace blink
+
+#endif // TrackDefaultList_h