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 7230e961ecec6f9f0eb007cf69832f03653b08fa..4f5a3e539ba37bfa10e2db252d23135151138110 100644
--- a/third_party/WebKit/Source/web/FrameLoaderClientImpl.cpp
+++ b/third_party/WebKit/Source/web/FrameLoaderClientImpl.cpp
@@ -56,6 +56,7 @@
 #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"
@@ -76,6 +77,7 @@
 #include "public/platform/WebURL.h"
 #include "public/platform/WebURLError.h"
 #include "public/platform/WebVector.h"
+#include "public/platform/modules/mediasession/WebMediaSession.h"
 #include "public/web/WebAutofillClient.h"
 #include "public/web/WebContentSettingsClient.h"
 #include "public/web/WebDOMEvent.h"
@@ -768,6 +770,14 @@ PassOwnPtr<WebMediaPlayer> FrameLoaderClientImpl::createWebMediaPlayer(
         encryptedMedia.contentDecryptionModule()));
 }
 
+PassOwnPtr<WebMediaSession> FrameLoaderClientImpl::createWebMediaSession()
+{
+    if (!m_webFrame->client())
+        return nullptr;
+
+    return adoptPtr(m_webFrame->client()->createMediaSession(m_webFrame));
+}
+
 ObjectContentType FrameLoaderClientImpl::objectContentType(
     const KURL& url,
     const String& explicitMimeType,