Pass origin to StartObservingMediaSinks.

chrome/browser/media/router/media_source_helper.cc

 // 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.
 
 #include "chrome/browser/media/router/media_source_helper.h"
 
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "chrome/browser/media/router/media_source.h"
+#include "chrome/common/url_constants.h"
 #include "url/gurl.h"
 
 namespace media_router {
 
 // Prefixes used to format and detect various protocols' media source URNs.
 // See: https://www.ietf.org/rfc/rfc3406.txt
 const char kTabMediaUrnPrefix[] = "urn:x-org.chromium.media:source:tab";
 const char kDesktopMediaUrn[] = "urn:x-org.chromium.media:source:desktop";
 const char kCastUrnPrefix[] = "urn:x-com.google.cast:application:";
 
 MediaSource MediaSourceForTab(int tab_id) {
   return MediaSource(base::StringPrintf("%s:%d", kTabMediaUrnPrefix, tab_id));
 }
 
 MediaSource MediaSourceForDesktop() {
-  return MediaSource(std::string(kDesktopMediaUrn));
+  MediaSource source(kDesktopMediaUrn);
+  source.set_origin(chrome::kChromeUIMediaRouterURL);
+  return source;
+}
+
+GURL OriginForDesktop() {
+  return GURL(std::string(chrome::kChromeUIMediaRouterURL));
 }
 
 MediaSource MediaSourceForCastApp(const std::string& app_id) {
   return MediaSource(kCastUrnPrefix + app_id);
 }
 
-MediaSource MediaSourceForPresentationUrl(const std::string& presentation_url) {
-  return MediaSource(presentation_url);
+MediaSource MediaSourceForPresentationUrl(const std::string& presentation_url,
+                                          const std::string& origin) {
+  MediaSource source(presentation_url);
+  source.set_origin(origin);
+  return source;
 }
 
 bool IsDesktopMirroringMediaSource(const MediaSource& source) {
   return base::StartsWith(source.id(), kDesktopMediaUrn,
                           base::CompareCase::SENSITIVE);
 }
 
 bool IsTabMirroringMediaSource(const MediaSource& source) {
   return base::StartsWith(source.id(), kTabMediaUrnPrefix,
                           base::CompareCase::SENSITIVE);
@@ skipping 17 matching lines @@
 std::string PresentationUrlFromMediaSource(const MediaSource& source) {
   return IsValidPresentationUrl(source.id()) ? source.id() : "";
 }
 
 bool IsValidPresentationUrl(const std::string& url) {
   GURL gurl(url);
   return gurl.is_valid() && gurl.SchemeIsHTTPOrHTTPS();
 }
 
 }  // namespace media_router