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

content/renderer/presentation/presentation_dispatcher.h

Index: content/renderer/presentation/presentation_dispatcher.h
diff --git a/content/renderer/presentation/presentation_dispatcher.h b/content/renderer/presentation/presentation_dispatcher.h
index 08ae8286c7dc9f6da35b1db3fc720cc5a7888aa1..785fbefc60a5f9b631c5a7a3f3c9d727226f635f 100644
--- a/content/renderer/presentation/presentation_dispatcher.h
+++ b/content/renderer/presentation/presentation_dispatcher.h
@@ -100,13 +100,13 @@ class CONTENT_EXPORT PresentationDispatcher
   void OnSessionMessagesReceived(
       presentation::PresentationSessionInfoPtr session_info,
       mojo::Array<presentation::SessionMessagePtr> messages) override;
+  void OnDefaultSessionStarted(
+      presentation::PresentationSessionInfoPtr session_info) override;
 
   void OnSessionCreated(
       blink::WebPresentationConnectionClientCallbacks* callback,
       presentation::PresentationSessionInfoPtr session_info,
       presentation::PresentationErrorPtr error);
-  void OnDefaultSessionStarted(
-      presentation::PresentationSessionInfoPtr session_info);
 
   // Call to PresentationService to send the message in |request|.
   // |session_info| and |message| of |reuqest| will be consumed.