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 4a6c43417c0624b63a46876258a7f5c6227dedba..ad49f32b1346af6dbbd8e415b69665bf2a0ba5d7 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"
@@ -74,6 +75,7 @@
 #include "public/platform/WebURL.h"
 #include "public/platform/WebURLError.h"
 #include "public/platform/WebVector.h"
+#include "public/platform/modules/mediasession/WebMediaSession.h"
 #include "public/platform/modules/serviceworker/WebServiceWorkerProvider.h"
 #include "public/platform/modules/serviceworker/WebServiceWorkerProviderClient.h"
 #include "public/web/WebAutofillClient.h"
@@ -781,6 +783,14 @@ PassOwnPtr<WebMediaPlayer> FrameLoaderClientImpl::createWebMediaPlayer(
         encryptedMedia.contentDecryptionModule()));
 }
 
+PassOwnPtr<WebMediaSession> FrameLoaderClientImpl::createWebMediaSession()
+{
+    if (!m_webFrame->client())
+        return nullptr;

[philipj_slow, 2015/10/19 14:22:55]

Note to the future: If this is actually reachable, then even when all platforms
have a WebMediaSession implementation, we can't assume that we can create one.

+
+    return adoptPtr(m_webFrame->client()->createMediaSession());
+}
+
 ObjectContentType FrameLoaderClientImpl::objectContentType(
     const KURL& url,
     const String& explicitMimeType,