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

content/public/browser/presentation_service_delegate.h

Index: content/public/browser/presentation_service_delegate.h
diff --git a/content/public/browser/presentation_service_delegate.h b/content/public/browser/presentation_service_delegate.h
index ba0bf99d56bfddcb0da9e3790d335432d6d99c09..14f9121204254fa46ac56272447305a245b70c3e 100644
--- a/content/public/browser/presentation_service_delegate.h
+++ b/content/public/browser/presentation_service_delegate.h
@@ -138,13 +138,20 @@ class CONTENT_EXPORT PresentationServiceDelegate {
       const PresentationSessionStartedCallback& success_cb,
       const PresentationSessionErrorCallback& error_cb) = 0;
 
-  // Close an existing presentation session.
+  // Closes an existing presentation session.
   // |render_process_id|, |render_frame_id|: ID for originating frame.
   // |presentation_id|: The ID of the presentation to close.
   virtual void CloseSession(int render_process_id,
                             int render_frame_id,
                             const std::string& presentation_id) = 0;
 
+  // Terminates an existing presentation session.
+  // |render_process_id|, |render_frame_id|: ID for originating frame.
+  // |presentation_id|: The ID of the presentation to terminate.
+  virtual void TerminateSession(int render_process_id,
+                                int render_frame_id,
+                                const std::string& presentation_id) = 0;
+
   // Listen for messages for a presentation session.

[whywhat, 2015/11/20 06:26:49]

nit: should you add 's' to the leading verb here and for the
ListenForStateChange below?

[mlamouri (slow - plz ping), 2015/11/27 11:48:47]

Done.

   // |render_process_id|, |render_frame_id|: ID for originating frame.
   // |session|: URL and ID of presentation session to listen for messages.