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

chrome/browser/media/router/presentation_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_PRESENTATION_REQUEST_H_
-#define CHROME_BROWSER_MEDIA_ROUTER_PRESENTATION_REQUEST_H_
-
-#include <string>
-
-#include "chrome/browser/media/router/media_source.h"
-#include "chrome/browser/media/router/render_frame_host_id.h"
-#include "url/gurl.h"
-
-namespace media_router {
-
-// Represents a presentation request made from a render frame. Contains the
-// presentation URL of the request, and information on the originating frame.
-class PresentationRequest {
- public:
-  PresentationRequest(const RenderFrameHostId& render_frame_host_id,
-                      const std::string& presentation_url,
-                      const GURL& frame_url);
-  ~PresentationRequest();
-
-  bool Equals(const PresentationRequest& other) const;
-
-  // Helper method to get the MediaSource for |presentation_url_|.
-  MediaSource GetMediaSource() const;
-
-  const RenderFrameHostId& render_frame_host_id() const {
-    return render_frame_host_id_;
-  }
-  const std::string& presentation_url() const { return presentation_url_; }
-  const GURL& frame_url() const { return frame_url_; }
-
- private:
-  // ID of RenderFrameHost that initiated the request.
-  const RenderFrameHostId render_frame_host_id_;
-
-  // URL of presentation.
-  const std::string presentation_url_;
-
-  // URL of frame from which the request was initiated.
-  const GURL frame_url_;
-};
-
-}  // namespace media_router
-
-#endif  // CHROME_BROWSER_MEDIA_ROUTER_PRESENTATION_REQUEST_H_