Implementing closeSession from WebPresentationClient to PresentationService.

content/browser/presentation/presentation_service_impl.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_PRESENTATION_PRESENTATION_SERVICE_IMPL_H_
 #define CONTENT_BROWSER_PRESENTATION_PRESENTATION_SERVICE_IMPL_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/containers/hash_tables.h"
@@ skipping 78 matching lines @@
   void ListenForDefaultSessionStart(
       const DefaultSessionMojoCallback& callback) override;
   void StartSession(
       const mojo::String& presentation_url,
       const mojo::String& presentation_id,
       const NewSessionMojoCallback& callback) override;
   void JoinSession(
       const mojo::String& presentation_url,
       const mojo::String& presentation_id,
       const NewSessionMojoCallback& callback) override;
+  void CloseSession(
+      const mojo::String& presentation_url,
+      const mojo::String& presentation_id) override;
 
   // mojo::InterfaceImpl override.
   // Note that this is called when the RenderFrameHost is deleted.
   void OnConnectionError() override;
 
   // WebContentsObserver override.
   void DidNavigateAnyFrame(
       content::RenderFrameHost* render_frame_host,
       const content::LoadCommittedDetails& details,
       const content::FrameNavigateParams& params) override;
@@ skipping 54 matching lines @@
       availability_contexts_;
 
   std::string default_presentation_url_;
 
   DISALLOW_COPY_AND_ASSIGN(PresentationServiceImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_PRESENTATION_PRESENTATION_SERVICE_IMPL_H_