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

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 3005609e936722a0eb1051965e1db2446c3e758a..7245edb2eb00f0fb0963e417a143255730376087 100644
--- a/content/public/browser/presentation_service_delegate.h
+++ b/content/public/browser/presentation_service_delegate.h
@@ -26,6 +26,11 @@ class PresentationSessionStateListener;
 using PresentationSessionMessageCallback = base::Callback<
     void(const ScopedVector<content::PresentationSessionMessage>&, bool)>;
 
+using PresentationReceiverSessionAvailableCallback =
+    base::Callback<void(const content::PresentationSessionInfo*)>;
+
+using SendMessageCallback = base::Callback<void(bool)>;
+
 // An interface implemented by embedders to handle presentation API calls
 // forwarded from PresentationServiceImpl.
 class CONTENT_EXPORT PresentationServiceDelegate {
@@ -51,7 +56,6 @@ class CONTENT_EXPORT PresentationServiceDelegate {
       base::Callback<void(const PresentationSessionInfo&)>;
   using PresentationSessionErrorCallback =
       base::Callback<void(const PresentationError&)>;
-  using SendMessageCallback = base::Callback<void(bool)>;
 
   virtual ~PresentationServiceDelegate() {}
 
@@ -179,6 +183,29 @@ class CONTENT_EXPORT PresentationServiceDelegate {
       int render_process_id,
       int render_frame_id,
       content::PresentationSessionStateListener* listener) = 0;
+
+  // Gets a receiver presentation session for the offscreen presentation hosted
+  // on the offscreen tab containing this frame, or waits until one is
+  // available.
+  // If there is at least one receiver presentation session, |callback| will
+  // be invoked with one of the sessions immediately.
+  // Otherwise, |callback| will be invoked when a receiver presentation session
+  // becomes available.
+  // If the calling frame is not the main frame of an offscreen tab,
+  // |callback| will be invoked with null.
+  virtual void GetPresentationReceiverSession(
+      int render_process_id,
+      int render_frame_id,
+      const PresentationReceiverSessionAvailableCallback& callback) = 0;
+
+  // Gets all receiver presentation sessions for the offscreen presentation
+  // hosted
+  // on the offscreen tab containing this frame.
+  // If the calling frame is not the main frame of an offscreen tab, an empty
+  // vector will be returned.
+  virtual std::vector<content::PresentationSessionInfo>
+  GetPresentationReceiverSessions(int render_process_id,
+                                  int render_frame_id) = 0;
 };
 
 }  // namespace content