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

chrome/browser/media/router/create_presentation_session_request.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 CHROME_BROWSER_MEDIA_ROUTER_CREATE_PRESENTATION_SESSION_REQUEST_H_
 #define CHROME_BROWSER_MEDIA_ROUTER_CREATE_PRESENTATION_SESSION_REQUEST_H_
 
 #include <string>
 
 #include "chrome/browser/media/router/media_route.h"
 #include "chrome/browser/media/router/media_source.h"
+#include "chrome/browser/media/router/presentation_request.h"
+#include "chrome/browser/media/router/render_frame_host_id.h"
 #include "content/public/browser/presentation_service_delegate.h"
 #include "url/gurl.h"
 
 namespace content {
 struct PresentationError;
 struct PresentationSessionInfo;
 }  // namespace content
 
 namespace media_router {
 
 // Holds parameters for creating a presentation session.
 // A request object is created by presentation_service_delegate_impl when it
 // gets create-session request. The object is then passed to and owned by the
 // MediaRouterUI. |success_cb| will be invoked when create-session
 // succeeds, or |error_cb| will be invoked when create-session fails or
 // the UI closes.
 class CreatePresentationSessionRequest {

[mlamouri (slow - plz ping), 2015/11/06 14:46:43]

What about these names:
- PresentationRequestCreator
- PresentationRequestMaker
- PresentationRequestFactory (it's not really a factory, but it's otherwise the
best name IMO)

[imcheng, 2015/11/07 02:00:46]

Well this class doesn't create PresentationRequests which I think is the source
of confusion. It is a representation of a request to create a presentation
session (to be renamed to connection).

  public:
   using PresentationSessionSuccessCallback =
       base::Callback<void(const content::PresentationSessionInfo&,
                           const MediaRoute::Id&)>;
   using PresentationSessionErrorCallback =
-      content::PresentationServiceDelegate::PresentationSessionErrorCallback;
-
+      content::PresentationSessionErrorCallback;
   // |presentation_url|: The presentation URL of the request. Must be a valid
   //                     URL.
   // |frame_url|: The URL of the frame that initiated the presentation request.
   // |success_cb|: Callback to invoke when the request succeeds. Must be valid.
   // |erorr_cb|: Callback to invoke when the request fails. Must be valid.
   CreatePresentationSessionRequest(
+      const RenderFrameHostId& render_frame_host_id,
       const std::string& presentation_url,
       const GURL& frame_url,
       const PresentationSessionSuccessCallback& success_cb,
       const PresentationSessionErrorCallback& error_cb);
   ~CreatePresentationSessionRequest();
 
-  const MediaSource& media_source() const { return media_source_; }
-  const GURL& frame_url() const { return frame_url_; }
+  const PresentationRequest& presentation_request() const {
+    return presentation_request_;
+  }
 
   // Invokes |success_cb_| or |error_cb_| with the given arguments.
   // These functions can only be invoked once per instance. It is an error
   // to invoke these functions more than once.
   void InvokeSuccessCallback(const std::string& presentation_id,
                              const MediaRoute::Id& route_id);
   void InvokeErrorCallback(const content::PresentationError& error);
 
   // Handle route creation/joining response by invoking the right callback.
   static void HandleRouteResponse(
       scoped_ptr<CreatePresentationSessionRequest> presentation_request,
       const MediaRoute* route,
       const std::string& presentation_id,
       const std::string& error);
 
  private:
-  const MediaSource media_source_;
-  const GURL frame_url_;
+  const PresentationRequest presentation_request_;
   PresentationSessionSuccessCallback success_cb_;
   PresentationSessionErrorCallback error_cb_;
   bool cb_invoked_;
 
   DISALLOW_COPY_AND_ASSIGN(CreatePresentationSessionRequest);
 };
 
 }  // namespace media_router
 
 #endif  // CHROME_BROWSER_MEDIA_ROUTER_CREATE_PRESENTATION_SESSION_REQUEST_H_