MD History: Do not collapse synced device card when tapping menu button

chrome/test/data/webui/md_history/history_synced_tabs_test.js

Index: chrome/test/data/webui/md_history/history_synced_tabs_test.js
diff --git a/chrome/test/data/webui/md_history/history_synced_tabs_test.js b/chrome/test/data/webui/md_history/history_synced_tabs_test.js
index 876c3e538d7cd08157ba13b8d72de9adee13fda0..63b4a3b4b6ac1f2f039f01bb9a4b4dcfce0ed122 100644
--- a/chrome/test/data/webui/md_history/history_synced_tabs_test.js
+++ b/chrome/test/data/webui/md_history/history_synced_tabs_test.js
@@ -251,6 +251,18 @@ cr.define('md_history.history_synced_tabs_test', function() {
         });
       });
 
+      test('show actions menu', function() {

[tsergeant, 2016/10/05 02:06:24]

Sadly, I have not been able to get MockInteractions to trigger the right events
to do an actual regression test of this.

[calamity, 2016/10/05 04:45:53]

=(

+        setForeignSessions(
+            [createSession(
+                'Chromebook', [createWindow(['https://example.com'])])]);
+
+        return flush().then(function() {
+          var cards = getCards(element);
+          MockInteractions.tap(cards[0].$['menu-button']);
+          assertTrue(element.$.menu.getIfExists().menuOpen);
+        });
+      });
+
       test('show sign in promo', function() {
         element.signInState = false;
         return flush().then(function() {