[Media Router] Add a presentation id to MediaRoute mapping in the MR

chrome/browser/media/router/media_router.h

Index: chrome/browser/media/router/media_router.h
diff --git a/chrome/browser/media/router/media_router.h b/chrome/browser/media/router/media_router.h
index 0f8fd4b7386f322a16b2950c04efea0b576f99e2..441a18d4c05ffc0a75896ebe051d687bcdbd2477 100644
--- a/chrome/browser/media/router/media_router.h
+++ b/chrome/browser/media/router/media_router.h
@@ -189,6 +189,20 @@ class MediaRouter : public KeyedService {
   // there is a change to the media routes, subclass MediaRoutesObserver.
   virtual std::vector<MediaRoute> GetCurrentRoutes() const = 0;
 
+  // Register |route| associated with |presentation_id| with this MediaRouter.

[imcheng, 2017/03/08 20:06:35]

Registers

[zhaobin, 2017/03/09 00:34:27]

Code removed.

+  virtual void RegisterPresentationRoute(const std::string& presentation_id,
+                                         const MediaRoute& route) = 0;
+
+  // Unregister media route associated with |presentation_id| with this

[imcheng, 2017/03/08 20:06:35]

Unregisters

[zhaobin, 2017/03/09 00:34:27]

Code removed.

+  // MediaRouter.
+  virtual void UnregisterPresentationRoute(
+      const std::string& presentation_id) = 0;
+
+  // Returns underlying media route associated with |presentation_id|. Returns

[imcheng, 2017/03/08 20:06:35]

s/underlying/the
s/media route/MediaRoute

[zhaobin, 2017/03/09 00:34:27]

Done.

+  // nullptr if no such media route exists.
+  virtual const MediaRoute* GetPresentationRoute(
+      const std::string& presentation_id) const = 0;
+
  private:
   friend class IssuesObserver;
   friend class MediaSinksObserver;