[Media Router] Convert MediaRouter to use GURL for presentation URLs.

chrome/browser/media/router/presentation_request.h

Index: chrome/browser/media/router/presentation_request.h
diff --git a/chrome/browser/media/router/presentation_request.h b/chrome/browser/media/router/presentation_request.h
index a8580285a38bcbd200c323f13226668aedf8fbb4..9a3009a52b26163aa0678b0856b48ea27c2b5a71 100644
--- a/chrome/browser/media/router/presentation_request.h
+++ b/chrome/browser/media/router/presentation_request.h
@@ -19,7 +19,7 @@ namespace media_router {
 class PresentationRequest {
  public:
   PresentationRequest(const RenderFrameHostId& render_frame_host_id,
-                      const std::vector<std::string>& presentation_urls,
+                      const std::vector<GURL>& presentation_urls,
                       const GURL& frame_url);
   PresentationRequest(const PresentationRequest& other);
   ~PresentationRequest();
@@ -33,7 +33,7 @@ class PresentationRequest {
     return render_frame_host_id_;
   }
   // TODO(crbug.com/627655): Use multiple URLs.
-  const std::string& presentation_url() const { return presentation_urls_[0]; }
+  const GURL& presentation_url() const { return presentation_urls_[0]; }
   const GURL& frame_url() const { return frame_url_; }
 
  private:
@@ -41,7 +41,7 @@ class PresentationRequest {
   const RenderFrameHostId render_frame_host_id_;
 
   // URLs of presentation.
-  const std::vector<std::string> presentation_urls_;
+  const std::vector<GURL> presentation_urls_;
 
   // URL of frame from which the request was initiated.
   const GURL frame_url_;