[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;

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

For the record, using Equals() is not a common pattern in Chromium. I will not
insist given that it seems to be commen in MR.

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

Acknowledged.

+
+  // 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_