Add WebKit prefix to MediaSource,SourceBuffer, and SourceBufferList objects.

Source/core/html/DOMURL.cpp

Index: Source/core/html/DOMURL.cpp
diff --git a/Source/core/html/DOMURL.cpp b/Source/core/html/DOMURL.cpp
index 499baea10430dc62ecfc48e694cb68ceef045fc9..070db932b7bc13b2b2a3234d066c98bac8a36e9e 100644
--- a/Source/core/html/DOMURL.cpp
+++ b/Source/core/html/DOMURL.cpp
@@ -39,15 +39,15 @@
 #include "core/loader/cache/MemoryCache.h"
 #include "core/platform/KURL.h"
 #include "core/platform/network/ResourceRequest.h"
-#include "modules/mediasource/MediaSource.h"
 #include "modules/mediasource/MediaSourceRegistry.h"
+#include "modules/mediasource/WebKitMediaSource.h"
 #include "modules/mediastream/MediaStream.h"
 #include "modules/mediastream/MediaStreamRegistry.h"
 #include "origin/SecurityOrigin.h"
 
 namespace WebCore {
 
-String DOMURL::createObjectURL(ScriptExecutionContext* scriptExecutionContext, MediaSource* source)
+String DOMURL::createObjectURL(ScriptExecutionContext* scriptExecutionContext, WebKitMediaSource* source)
 {
     // Since WebWorkers cannot obtain MediaSource objects, we should be on the main thread.
     ASSERT(isMainThread());