[Cast,Android,Presentation API] Split CastRouteController into session and media routes.

chrome/android/java/src/org/chromium/chrome/browser/media/router/MediaRoute.java

Index: chrome/android/java/src/org/chromium/chrome/browser/media/router/MediaRoute.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/media/router/MediaRoute.java b/chrome/android/java/src/org/chromium/chrome/browser/media/router/MediaRoute.java
new file mode 100644
index 0000000000000000000000000000000000000000..47ba6233f091ca6419b1adeb63570e9a6f246156
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/media/router/MediaRoute.java
@@ -0,0 +1,52 @@
+// 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.
+
+package org.chromium.chrome.browser.media.router;
+
+/**
+ * Contains all the info about the media route created by any {@link MediaRouteProvider}.
+ */
+public class MediaRoute {
+    private static final String MEDIA_ROUTE_ID_PREFIX = "route:";
+    private static final String MEDIA_ROUTE_ID_SEPARATOR = "/";
+
+    /**
+     * The unique id of the route, assigned by the {@link ChromeMediaRouter}.
+     */
+    public final String id;
+
+    /**
+     * The {@link MediaRouteProvider} unique id of the sink the route was created for.
+     */
+    public final String sinkId;
+
+    /**
+     * The presentation URL that the route was created for.
+     */
+    public final String sourceId;
+
+    /**
+     * The presentation id that was assigned to the route.
+     */
+    public final String presentationId;
+
+    public MediaRoute(String sinkId, String sourceId, String presentationId) {
+        this.id = createMediaRouteId(presentationId, sinkId, sourceId);
+        this.sinkId = sinkId;
+        this.sourceId = sourceId;
+        this.presentationId = presentationId;
+    }
+
+    private static String createMediaRouteId(
+            String presentationId, String sinkId, String sourceUrn) {
+        StringBuilder builder = new StringBuilder();
+        builder.append(MEDIA_ROUTE_ID_PREFIX);
+        builder.append(presentationId);
+        builder.append(MEDIA_ROUTE_ID_SEPARATOR);
+        builder.append(sinkId);
+        builder.append(MEDIA_ROUTE_ID_SEPARATOR);
+        builder.append(sourceUrn);
+        return builder.toString();
+    }
+}