[Presentation API / Media Router] Clean up default pres URL logic.

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 <deque>
 #include <map>
 #include <string>
@@ skipping 76 matching lines @@
                            ReceiveSessionMessagesAfterReset);
   FRIEND_TEST_ALL_PREFIXES(PresentationServiceImplTest,
                            MaxPendingStartSessionRequests);
   FRIEND_TEST_ALL_PREFIXES(PresentationServiceImplTest,
                            MaxPendingJoinSessionRequests);
   FRIEND_TEST_ALL_PREFIXES(PresentationServiceImplTest,
                            ListenForSessionStateChange);
   // Maximum number of pending JoinSession requests at any given time.
   static const int kMaxNumQueuedSessionRequests = 10;
 
-  using DefaultSessionMojoCallback =
+  using PresentationSessionMojoCallback =
       mojo::Callback<void(presentation::PresentationSessionInfoPtr)>;
   using SessionStateCallback =
       mojo::Callback<void(presentation::PresentationSessionInfoPtr,
           presentation::PresentationSessionState)>;
   using SessionMessagesCallback =
       mojo::Callback<void(mojo::Array<presentation::SessionMessagePtr>)>;
   using SendMessageMojoCallback = mojo::Callback<void(bool)>;
 
   // Listener implementation owned by PresentationServiceImpl. An instance of
   // this is created when PresentationRequest.getAvailability() is resolved.
@@ skipping 10 matching lines @@
     // PresentationScreenAvailabilityListener implementation.
     std::string GetAvailabilityUrl() const override;
     void OnScreenAvailabilityChanged(bool available) override;
     void OnScreenAvailabilityNotSupported() override;
 
    private:
     const std::string availability_url_;
     PresentationServiceImpl* const service_;
   };
 
-  class CONTENT_EXPORT DefaultSessionStartContext {
-   public:
-    DefaultSessionStartContext();
-    ~DefaultSessionStartContext();
-
-    // Adds a callback. May invoke the callback immediately if |session| using
-    // default presentation URL was already started.
-    void AddCallback(const DefaultSessionMojoCallback& callback);
-
-    // Sets the session info. Maybe invoke callbacks queued with AddCallback().
-    void set_session(const PresentationSessionInfo& session);
-
-   private:
-    // Flush all queued callbacks by invoking them with null
-    // PresentationSessionInfoPtr.
-    void Reset();
-
-    ScopedVector<DefaultSessionMojoCallback> callbacks_;
-    scoped_ptr<PresentationSessionInfo> session_;
-  };
-
   // Ensures the provided NewSessionMojoCallback is invoked exactly once
   // before it goes out of scope.
   class NewSessionMojoCallbackWrapper {
    public:
     explicit NewSessionMojoCallbackWrapper(
         const NewSessionMojoCallback& callback);
     ~NewSessionMojoCallbackWrapper();
 
     void Run(presentation::PresentationSessionInfoPtr session,
              presentation::PresentationErrorPtr error);
@@ skipping 11 matching lines @@
   PresentationServiceImpl(
       RenderFrameHost* render_frame_host,
       WebContents* web_contents,
       PresentationServiceDelegate* delegate);
 
   // PresentationService implementation.
   void SetDefaultPresentationURL(const mojo::String& url) override;
   void SetClient(presentation::PresentationServiceClientPtr client) override;
   void ListenForScreenAvailability(const mojo::String& url) override;
   void StopListeningForScreenAvailability(const mojo::String& url) override;
-  void ListenForDefaultSessionStart(
-      const DefaultSessionMojoCallback& callback) override;
   void StartSession(
       const mojo::String& presentation_url,
       const NewSessionMojoCallback& callback) override;
   void JoinSession(
       const mojo::String& presentation_url,
       const mojo::String& presentation_id,
       const NewSessionMojoCallback& callback) override;
   void SendSessionMessage(presentation::PresentationSessionInfoPtr session_info,
                           presentation::SessionMessagePtr session_message,
                           const SendMessageMojoCallback& callback) override;
   void CloseSession(
       const mojo::String& presentation_url,
       const mojo::String& presentation_id) override;
   void ListenForSessionStateChange() override;
   void ListenForSessionMessages(
       presentation::PresentationSessionInfoPtr session) override;
 
   // Creates a binding between this object and |request|.
   void Bind(mojo::InterfaceRequest<presentation::PresentationService> request);
 
   // WebContentsObserver override.
   void DidNavigateAnyFrame(
       content::RenderFrameHost* render_frame_host,
       const content::LoadCommittedDetails& details,
       const content::FrameNavigateParams& params) override;
   void RenderFrameDeleted(content::RenderFrameHost* render_frame_host) override;
 
   // PresentationServiceDelegate::Observer
   void OnDelegateDestroyed() override;
-  void OnDefaultPresentationStarted(const PresentationSessionInfo& session)
-      override;
+
+  // Passed to embedder's implementation of PresentationServiceDelegate for
+  // later invocation when default presentation has started.
+  void OnDefaultPresentationStarted(
+      const PresentationSessionInfo& session_info);
 
   // Finds the callback from |pending_join_session_cbs_| using
   // |request_session_id|.
   // If it exists, invoke it with |session| and |error|, then erase it from
   // |pending_join_session_cbs_|.
   void RunAndEraseJoinSessionMojoCallback(
       int request_session_id,
       presentation::PresentationSessionInfoPtr session,
       presentation::PresentationErrorPtr error);
 
@@ skipping 54 matching lines @@
 
   // For StartSession requests.
   // Set to a positive value when a StartSession request is being processed.
   int start_session_request_id_;
   scoped_ptr<NewSessionMojoCallbackWrapper> pending_start_session_cb_;
 
   // For JoinSession requests.
   base::hash_map<int, linked_ptr<NewSessionMojoCallbackWrapper>>
       pending_join_session_cbs_;
 
-  scoped_ptr<DefaultSessionStartContext> default_session_start_context_;
-
   // RAII binding of |this| to an Presentation interface request.
   // The binding is removed when binding_ is cleared or goes out of scope.
   scoped_ptr<mojo::Binding<presentation::PresentationService>> binding_;
 
   // There can be only one send message request at a time.
   scoped_ptr<SendMessageMojoCallback> send_message_callback_;
 
   scoped_ptr<SessionMessagesCallback> on_session_messages_callback_;
 
   // ID of the RenderFrameHost this object is associated with.
   int render_process_id_;
   int render_frame_id_;
 
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<PresentationServiceImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PresentationServiceImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_PRESENTATION_PRESENTATION_SERVICE_IMPL_H_