Eliminate MediaPlayer & MediaPlayerClient abstractions

Source/core/loader/EmptyClients.cpp

Index: Source/core/loader/EmptyClients.cpp
diff --git a/Source/core/loader/EmptyClients.cpp b/Source/core/loader/EmptyClients.cpp
index 1e096b728437d777815f33cd96750743f960fbc0..5e1d0de904497449fd1866ce33871e98460ae68d 100644
--- a/Source/core/loader/EmptyClients.cpp
+++ b/Source/core/loader/EmptyClients.cpp
@@ -37,6 +37,7 @@
 #include "platform/FileChooser.h"
 #include "platform/Widget.h"
 #include "public/platform/WebApplicationCacheHost.h"
+#include "public/platform/WebMediaPlayer.h"
 #include "public/platform/WebServiceWorkerProvider.h"
 #include "public/platform/WebServiceWorkerProviderClient.h"
 
@@ -134,6 +135,11 @@ PassRefPtrWillBeRawPtr<Widget> EmptyFrameLoaderClient::createJavaAppletWidget(HT
     return nullptr;
 }
 
+PassOwnPtr<WebMediaPlayer> EmptyFrameLoaderClient::createWebMediaPlayer(HTMLMediaElement*, const WebURL&)
+{
+    return nullptr;
+}
+
 void EmptyTextCheckerClient::requestCheckingOfString(PassRefPtrWillBeRawPtr<TextCheckingRequest>)
 {
 }