Add minimal implementation of unprefixed MediaSource API that has feature parity with prefixed API

Source/modules/mediasource/MediaSource.h

Index: Source/modules/mediasource/MediaSource.h
diff --git a/Source/modules/mediasource/WebKitMediaSource.h b/Source/modules/mediasource/MediaSource.h
similarity index 71%
copy from Source/modules/mediasource/WebKitMediaSource.h
copy to Source/modules/mediasource/MediaSource.h
index ed64c06c0e3e71148d88aea835497d38078c527f..2d5494625422732d2d8a41da602e44a6451719d5 100644
--- a/Source/modules/mediasource/WebKitMediaSource.h
+++ b/Source/modules/mediasource/MediaSource.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2012 Google Inc. All rights reserved.
+ * Copyright (C) 2013 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
@@ -28,27 +28,27 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef WebKitMediaSource_h
-#define WebKitMediaSource_h
+#ifndef MediaSource_h
+#define MediaSource_h
 
 #include "bindings/v8/ScriptWrappable.h"
 #include "modules/mediasource/MediaSourceBase.h"
-#include "modules/mediasource/WebKitSourceBuffer.h"
-#include "modules/mediasource/WebKitSourceBufferList.h"
+#include "modules/mediasource/SourceBuffer.h"
+#include "modules/mediasource/SourceBufferList.h"
 #include "wtf/RefCounted.h"
 
 namespace WebCore {
 
-class WebKitMediaSource : public MediaSourceBase, public ScriptWrappable {
+class MediaSource : public MediaSourceBase, public ScriptWrappable {
 public:
-    static PassRefPtr<WebKitMediaSource> create(ScriptExecutionContext*);
-    virtual ~WebKitMediaSource() { }
+    static PassRefPtr<MediaSource> create(ScriptExecutionContext*);
+    virtual ~MediaSource();
 
-    // WebKitMediaSource.idl methods
-    WebKitSourceBufferList* sourceBuffers();
-    WebKitSourceBufferList* activeSourceBuffers();
-    WebKitSourceBuffer* addSourceBuffer(const String& type, ExceptionCode&);
-    void removeSourceBuffer(WebKitSourceBuffer*, ExceptionCode&);
+    // MediaSource.idl methods
+    SourceBufferList* sourceBuffers() { return m_sourceBuffers.get(); }
+    SourceBufferList* activeSourceBuffers() { return m_activeSourceBuffers.get(); }
+    SourceBuffer* addSourceBuffer(const String& type, ExceptionCode&);
+    void removeSourceBuffer(SourceBuffer*, ExceptionCode&);
     static bool isTypeSupported(const String& type);
 
     // EventTarget interface
@@ -60,13 +60,13 @@ public:
     virtual void reportMemoryUsage(MemoryObjectInfo*) const OVERRIDE;
 
 private:
-    explicit WebKitMediaSource(ScriptExecutionContext*);
+    explicit MediaSource(ScriptExecutionContext*);
 
     // MediaSourceBase interface
     virtual void setReadyState(const AtomicString&) OVERRIDE;
 
-    RefPtr<WebKitSourceBufferList> m_sourceBuffers;
-    RefPtr<WebKitSourceBufferList> m_activeSourceBuffers;
+    RefPtr<SourceBufferList> m_sourceBuffers;
+    RefPtr<SourceBufferList> m_activeSourceBuffers;
 };
 
 } // namespace WebCore