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 28a83285f71445ca6c625307fcac2c28b810531a..ec0909d4354b0fbe8f7680f3e2c67939da2bd183 100644
--- a/content/public/browser/presentation_service_delegate.h
+++ b/content/public/browser/presentation_service_delegate.h
@@ -137,14 +137,21 @@ 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;
 
-  // Listen for messages for a presentation session.
+  // 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;
+
+  // Listens for messages for a presentation session.
   // |render_process_id|, |render_frame_id|: ID for originating frame.
   // |session|: URL and ID of presentation session to listen for messages.
   // |message_cb|: Invoked with a non-empty list of messages whenever there are