[Presentation API] Additional plumbing for PresentationServiceImpl.

content/public/browser/presentation_service_delegate.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_PUBLIC_BROWSER_PRESENTATION_SERVICE_DELEGATE_H_
 #define CONTENT_PUBLIC_BROWSER_PRESENTATION_SERVICE_DELEGATE_H_
 
+#include "base/callback.h"
 #include "content/common/content_export.h"
+#include "content/public/browser/presentation_session.h"
 
 namespace content {
 
 class PresentationScreenAvailabilityListener;
 
 // An interface implemented by embedders to handle presentation API calls
 // forwarded from PresentationServiceImpl.
 class CONTENT_EXPORT PresentationServiceDelegate {
  public:
   // Observer interface to listen for changes to PresentationServiceDelegate.
   class CONTENT_EXPORT Observer {
    public:
     // Called when the PresentationServiceDelegate is being destroyed.
     virtual void OnDelegateDestroyed() = 0;
 
    protected:
     virtual ~Observer() {}
   };
 
+  using PresentationSessionSuccessCallback =
+      base::Callback<void(const PresentationSessionInfo&)>;
+  using PresentationSessionErrorCallback =
+      base::Callback<void(const PresentationError&)>;
+
   virtual ~PresentationServiceDelegate() {}
 
   // Registers an observer with this class to listen for updates to this class.
   // This class does not own the observer.
   // It is an error to add an observer if it has already been added before.
   virtual void AddObserver(Observer* observer) = 0;
   // Unregisters an observer with this class.
   virtual void RemoveObserver(Observer* observer) = 0;
 
   // Registers |listener| to continuously listen for
@@ skipping 14 matching lines @@
   virtual void RemoveScreenAvailabilityListener(
       int render_process_id,
       int render_frame_id,
       PresentationScreenAvailabilityListener* listener) = 0;
 
   // Unregisters all listeners associated with the frame given by
   // |render_process_id| and |render_frame_id|.
   virtual void RemoveAllScreenAvailabilityListeners(
       int render_process_id,
       int render_frame_id) = 0;
+
+  // Sets the default presentation URL for frame given by |render_process_id|
+  // and |render_frame_id|.
+  // Pass in empty string to unset the default presentation URL.
+  virtual void SetDefaultPresentationUrl(
+      int render_process_id,
+      int render_frame_id,
+      const std::string& default_presentation_url) = 0;
+
+  // Starts a new presentation session.
+  // This brings up a screen list for the user to select a screen to
+  // establish the presentation session on.
+  // |render_process_id|, |render_frame_id|: ID of originating frame.
+  // |presentation_url|: URL of the presentation.
+  // |presentation_id|: The caller may provide an non-empty string to be used
+  // as the ID of the presentation. If this is an empty string, the embedder
+  // will automatically generate one.
+  // |success_cb|: Invoked with session info, if presentation session started
+  // successfully.
+  // |error_cb|: Invoked with error reason, if presentation session did not
+  // start.
+  virtual void StartSession(
+      int render_process_id,
+      int render_frame_id,
+      const std::string& presentation_url,
+      const std::string& presentation_id,
+      const PresentationSessionSuccessCallback& success_cb,
+      const PresentationSessionErrorCallback& error_cb) = 0;
+
+  // Joins an existing presentation session. Unlike StartSession(), this
+  // does not bring a screen list UI.
+  // |render_process_id|, |render_frame_id|: ID for originating frame.
+  // |presentation_url|: URL of the presentation.
+  // |presentation_id|: The ID of the presentation to join.
+  // |success_cb|: Invoked with session info, if presentation session joined
+  // successfully.
+  // |error_cb|: Invoked with error reason, if joining failed.
+  virtual void JoinSession(
+      int render_process_id,
+      int render_frame_id,
+      const std::string& presentation_url,
+      const std::string& presentation_id,
+      const PresentationSessionSuccessCallback& success_cb,
+      const PresentationSessionErrorCallback& error_cb) = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_PRESENTATION_SERVICE_DELEGATE_H_