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

chrome/browser/media/router/create_presentation_session_request.h

Index: chrome/browser/media/router/create_presentation_session_request.h
diff --git a/chrome/browser/media/router/create_presentation_session_request.h b/chrome/browser/media/router/create_presentation_session_request.h
index 9cebcb9aabc8a8d0644db629eea410567e462026..3d751397cc4e97764816f1545c23d082b22180f8 100644
--- a/chrome/browser/media/router/create_presentation_session_request.h
+++ b/chrome/browser/media/router/create_presentation_session_request.h
@@ -9,6 +9,8 @@
 
 #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"
 
@@ -31,22 +33,23 @@ class CreatePresentationSessionRequest {
       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
@@ -63,8 +66,7 @@ class CreatePresentationSessionRequest {
       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_;