[Presentation API] 1-UA presentation support + presenter APIs.

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 <memory>
 #include <string>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/memory/scoped_vector.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/presentation_session.h"
 #include "content/public/browser/presentation_session_message.h"
 
 namespace content {
 
 class PresentationScreenAvailabilityListener;
 
 using PresentationSessionStartedCallback =
     base::Callback<void(const PresentationSessionInfo&)>;
 using PresentationSessionErrorCallback =
     base::Callback<void(const PresentationError&)>;
+using SendMessageCallback = base::Callback<void(bool)>;
 
 // Param #0: a vector of messages that are received.
 // Param #1: tells the callback handler that it may reuse strings or buffers
 //           in the messages contained within param #0.
 using PresentationSessionMessageCallback = base::Callback<
     void(const ScopedVector<content::PresentationSessionMessage>&, bool)>;
 
 struct PresentationConnectionStateChangeInfo {
   explicit PresentationConnectionStateChangeInfo(
       PresentationConnectionState state)
@@ skipping 18 matching lines @@
   // 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 SendMessageCallback = base::Callback<void(bool)>;
-
   virtual ~PresentationServiceDelegate() {}
 
   // Registers an observer associated with frame with |render_process_id|
   // and |render_frame_id| with this class to listen for updates.
   // This class does not own the observer.
   // It is an error to add an observer if there is already an observer for that
   // frame.
   virtual void AddObserver(int render_process_id,
                            int render_frame_id,
                            Observer* observer) = 0;
@@ skipping 117 matching lines @@
   // frame.
   // |render_process_id|, |render_frame_id|: ID of frame.
   // |connection|: PresentationConnection to listen for state changes.
   // |state_changed_cb|: Invoked with the PresentationConnection and its new
   // state whenever there is a state change.
   virtual void ListenForConnectionStateChange(
       int render_process_id,
       int render_frame_id,
       const PresentationSessionInfo& connection,
       const PresentationConnectionStateChangedCallback& state_changed_cb) = 0;
+
+  // Returns the current list of receiver connections for the offscreen
+  // presentation hosted on the offscreen tab containing this frame.
+  // In additions, registers |callback| to be run when a new receiver connection
+  // is available.
+  virtual std::vector<content::PresentationSessionInfo> GetReceiverConnections(
+      int render_process_id,
+      int render_frame_id,
+      const PresentationSessionStartedCallback& callback) = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_PRESENTATION_SERVICE_DELEGATE_H_