Use url::Origin to represent security origins in MediaStream-related code.

content/renderer/media/mock_media_stream_dispatcher.cc

Index: content/renderer/media/mock_media_stream_dispatcher.cc
diff --git a/content/renderer/media/mock_media_stream_dispatcher.cc b/content/renderer/media/mock_media_stream_dispatcher.cc
index 739f68989bb72dd4e3984eda9446288db80375d5..b173192e8894a03a5e2cf91a876c35be88d30b46 100644
--- a/content/renderer/media/mock_media_stream_dispatcher.cc
+++ b/content/renderer/media/mock_media_stream_dispatcher.cc
@@ -31,7 +31,7 @@ void MockMediaStreamDispatcher::GenerateStream(
     int request_id,
     const base::WeakPtr<MediaStreamDispatcherEventHandler>& event_handler,
     const StreamControls& controls,
-    const GURL& url) {
+    const url::Origin& url) {
   // Audio and video share the same request so we use |audio_input_request_id_|
   // only.
   audio_input_request_id_ = request_id;
@@ -59,7 +59,7 @@ void MockMediaStreamDispatcher::EnumerateDevices(
     int request_id,
     const base::WeakPtr<MediaStreamDispatcherEventHandler>& event_handler,
     MediaStreamType type,
-    const GURL& security_origin) {
+    const url::Origin& security_origin) {
   if (type == MEDIA_DEVICE_AUDIO_CAPTURE) {
     audio_input_request_id_ = request_id;
     audio_input_array_.clear();