Eliminate MediaPlayer & MediaPlayerClient abstractions(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 4009845fde9f2db3b6f1f45f9bb48a584c6554ae..6e9491f02e6534ee4d528ba00f192820ee0ca72b 100644
--- a/Source/core/html/HTMLVideoElement.cpp
+++ b/Source/core/html/HTMLVideoElement.cpp
@@ -117,8 +117,8 @@ 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);
 }