Pass media session id over IPC

third_party/WebKit/public/platform/modules/mediasession/WebMediaSession.h

Index: third_party/WebKit/public/platform/modules/mediasession/WebMediaSession.h
diff --git a/third_party/WebKit/public/platform/modules/mediasession/WebMediaSession.h b/third_party/WebKit/public/platform/modules/mediasession/WebMediaSession.h
index e0f465956a4fedce39d4a1b8c0eb42b4f76d82f2..439a6c7a02109032d2e8bc83eb36556b14d14189 100644
--- a/third_party/WebKit/public/platform/modules/mediasession/WebMediaSession.h
+++ b/third_party/WebKit/public/platform/modules/mediasession/WebMediaSession.h
@@ -17,6 +17,10 @@ struct WebMediaMetadata;
 
 class WebMediaSession {
 public:
+    enum {
+        DefaultID = 0
+    };
+
     virtual ~WebMediaSession() = default;
 
     // Tries to activate the session by requesting audio focus from
@@ -32,7 +36,7 @@ public:
     virtual void deactivate(WebMediaSessionDeactivateCallback*) = 0;
 
     // Updates the metadata associated with the WebMediaSession. The metadata
-    // can be a nullptr in which case the associated metadata should be reset.
+    // can be a nullptr in which case the assouciated metadata should be reset.
     // The pointer is not owned by the WebMediaSession implementation.
     virtual void setMetadata(const WebMediaMetadata*) = 0;
 };