Presentation API: implement renderer side of PresentationConnection.close().

content/common/presentation/presentation_service.mojom

Index: content/common/presentation/presentation_service.mojom
diff --git a/content/common/presentation/presentation_service.mojom b/content/common/presentation/presentation_service.mojom
index 422ae5874d4d1a572136a7dadaf5557a824e8f4d..e9f99884aed28099407154495fde82a6529d180f 100644
--- a/content/common/presentation/presentation_service.mojom
+++ b/content/common/presentation/presentation_service.mojom
@@ -87,9 +87,12 @@ interface PresentationService {
   SendSessionMessage(PresentationSessionInfo sessionInfo,
                      SessionMessage message_request) => (bool success);
 
-  // Called when closeSession() is called by the frame.
+  // Called when close() is called by the frame.
   CloseSession(string presentation_url, string presentation_id);
 
+  // Called when terminate() is called by the frame.
+  TerminateSession(string presentation_url, string presentation_id);
+
   // Starts listening for state changes for sessions created on this frame.
   // When state change occurs, PresentationServiceClient::OnSessionStateChanged
   // will be invoked with the session and its new state.