Open Media Router dialog to route details view if there is a single local route.

The new expected behavior when the MR dialog is opened is:
- If there is a single local route, show the route details view.
- If there is more than one local route, show the sink list.
- If there are no local routes, show the sink list.

Behavior per discussion with UX.

Review URL: https://codereview.chromium.org/1264483003

Cr-Commit-Position: refs/heads/master@{#341066}

1 files changed, 36 insertions, 2 deletions

diff --git a/chrome/test/data/webui/media_router/media_router_container_tests.js b/chrome/test/data/webui/media_router/media_router_container_tests.js
index 704bb01..95e8f2a 100644
--- a/chrome/test/data/webui/media_router/media_router_container_tests.js
+++ b/chrome/test/data/webui/media_router/media_router_container_tests.js
@@ -119,8 +119,13 @@ cr.define('media_router_container', function() {
         ];
 
         fakeRouteList = [
-          new media_router.Route('id 1', 'sink id 1', 'Title 1', true),
-          new media_router.Route('id 2', 'sink id 2', 'Title 2', false),
+          new media_router.Route('id 1', 'sink id 1', 'Title 1', 0, true),
+          new media_router.Route('id 2', 'sink id 2', 'Title 2', 1, false),
+        ];
+
+        fakeRouteListWithLocalRoutesOnly = [
+          new media_router.Route('id 1', 'sink id 1', 'Title 1', 0, true),
+          new media_router.Route('id 2', 'sink id 2', 'Title 2', 1, true),
         ];
 
         fakeSinkList = [
@@ -185,6 +190,8 @@ cr.define('media_router_container', function() {
           var sinkList =
               container.$['sink-list'].querySelectorAll('paper-item');
 
+          // Start from the SINK_LIST view.
+          container.showSinkList_();
           checkCurrentView(container.CONTAINER_VIEW_.SINK_LIST);
           MockInteractions.tap(sinkList[0]);
           checkCurrentView(container.CONTAINER_VIEW_.ROUTE_DETAILS);
@@ -313,6 +320,33 @@ cr.define('media_router_container', function() {
         });
       });
 
+      // Tests the expected view when there is only one local active route and
+      // media_router_container is created for the first time.
+      test('initial view with one local route', function() {
+        container.sinkList = fakeSinkList;
+        container.routeList = fakeRouteList;
+
+        checkCurrentView(container.CONTAINER_VIEW_.ROUTE_DETAILS);
+      });
+
+      // Tests the expected view when there are multiple local active routes
+      // and media_router_container is created for the first time.
+      test('initial view with multiple local routes', function() {
+        container.sinkList = fakeSinkList;
+        container.routeList = fakeRouteListWithLocalRoutesOnly;
+
+        checkCurrentView(container.CONTAINER_VIEW_.SINK_LIST);
+      });
+
+      // Tests the expected view when there are no local active routes and
+      // media_router_container is created for the first time.
+      test('initial view with one local route', function() {
+        container.sinkList = fakeSinkList;
+        container.routeList = [];
+
+        checkCurrentView(container.CONTAINER_VIEW_.SINK_LIST);
+      });
+
       // Tests for expected visible UI when the view is CAST_MODE_LIST.
       test('cast mode list state visibility', function() {
         container.showCastModeList_();