Eliminate MediaPlayer abstraction(seek, duration, poster APIs)

Source/core/html/HTMLVideoElement.cpp

Index: Source/core/html/HTMLVideoElement.cpp
diff --git a/Source/core/html/HTMLVideoElement.cpp b/Source/core/html/HTMLVideoElement.cpp
index d424be0779c99cef4adcd8bf8da8a4a6f1454c0d..d9e5a5630dcceb3e0a213fc3615e91c91eded1bb 100644
--- a/Source/core/html/HTMLVideoElement.cpp
+++ b/Source/core/html/HTMLVideoElement.cpp
@@ -123,8 +123,8 @@ void HTMLVideoElement::parseAttribute(const QualifiedName& name, const AtomicStr
                 toRenderImage(renderer())->imageResource()->setImageResource(0);
         }
         // Notify the player when the poster image URL changes.
-        if (player())
-            player()->setPoster(posterImageURL());
+        if (webMediaPlayer())
+            webMediaPlayer()->setPoster(posterImageURL());
     } else
         HTMLMediaElement::parseAttribute(name, value);
 }