Revert of Introduce WebMediaSession

third_party/WebKit/Source/web/FrameLoaderClientImpl.cpp

Index: third_party/WebKit/Source/web/FrameLoaderClientImpl.cpp
diff --git a/third_party/WebKit/Source/web/FrameLoaderClientImpl.cpp b/third_party/WebKit/Source/web/FrameLoaderClientImpl.cpp
index ad49f32b1346af6dbbd8e415b69665bf2a0ba5d7..4a6c43417c0624b63a46876258a7f5c6227dedba 100644
--- a/third_party/WebKit/Source/web/FrameLoaderClientImpl.cpp
+++ b/third_party/WebKit/Source/web/FrameLoaderClientImpl.cpp
@@ -56,7 +56,6 @@
 #include "modules/device_orientation/DeviceOrientationController.h"
 #include "modules/encryptedmedia/HTMLMediaElementEncryptedMedia.h"
 #include "modules/gamepad/NavigatorGamepad.h"
-#include "modules/mediasession/MediaSession.h"
 #include "modules/serviceworkers/NavigatorServiceWorker.h"
 #include "modules/storage/DOMWindowStorageController.h"
 #include "modules/vr/NavigatorVRDevice.h"
@@ -75,7 +74,6 @@
 #include "public/platform/WebURL.h"
 #include "public/platform/WebURLError.h"
 #include "public/platform/WebVector.h"
-#include "public/platform/modules/mediasession/WebMediaSession.h"
 #include "public/platform/modules/serviceworker/WebServiceWorkerProvider.h"
 #include "public/platform/modules/serviceworker/WebServiceWorkerProviderClient.h"
 #include "public/web/WebAutofillClient.h"
@@ -783,14 +781,6 @@
         encryptedMedia.contentDecryptionModule()));
 }
 
-PassOwnPtr<WebMediaSession> FrameLoaderClientImpl::createWebMediaSession()
-{
-    if (!m_webFrame->client())
-        return nullptr;
-
-    return adoptPtr(m_webFrame->client()->createMediaSession());
-}
-
 ObjectContentType FrameLoaderClientImpl::objectContentType(
     const KURL& url,
     const String& explicitMimeType,