[Presentation API, Android] Implement routes observers

chrome/browser/media/android/router/media_router_android.h

Index: chrome/browser/media/android/router/media_router_android.h
diff --git a/chrome/browser/media/android/router/media_router_android.h b/chrome/browser/media/android/router/media_router_android.h
index 42b182d6dd549f2df91a766fad2735008f9943db..429a4dba45481b3ba20f6c5c54bd1af639e31f80 100644
--- a/chrome/browser/media/android/router/media_router_android.h
+++ b/chrome/browser/media/android/router/media_router_android.h
@@ -52,18 +52,19 @@ class MediaRouterAndroid : public MediaRouter {
 
   // JNI functions.
   void OnSinksReceived(
-      JNIEnv* env, jobject obj, jstring source_urn, jint count);
+      JNIEnv* env, jobject obj, jstring jsource_urn, jint jcount);
   void OnRouteCreated(
       JNIEnv* env,
       jobject obj,
-      jstring media_route_id,
+      jstring jmedia_route_id,
       jint jcreate_route_request_id,
       jboolean jis_local);
   void OnRouteCreationError(
       JNIEnv* env,
       jobject obj,
-      jstring error_text,
+      jstring jerror_text,
       jint jcreate_route_request_id);
+  void OnRouteClosed(JNIEnv* env, jobject obj, jstring jmedia_route_id);
 
  private:
   friend class MediaRouterFactory;
@@ -89,6 +90,8 @@ class MediaRouterAndroid : public MediaRouter {
       scoped_ptr<base::ObserverList<MediaSinksObserver>>>;
   MediaSinkObservers sinks_observers_;
 
+  base::ObserverList<MediaRoutesObserver> routes_observers_;
+
   struct CreateMediaRouteRequest {
     CreateMediaRouteRequest(
         const MediaSource& source,
@@ -107,6 +110,9 @@ class MediaRouterAndroid : public MediaRouter {
       IDMap<CreateMediaRouteRequest, IDMapOwnPointer>;
   CreateMediaRouteRequests create_route_requests_;
 
+  using MediaRoutes = std::vector<MediaRoute>;
+  MediaRoutes active_routes_;
+
   DISALLOW_COPY_AND_ASSIGN(MediaRouterAndroid);
 };