Shortcut ctrl+shift+T added on android.

chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java

Index: chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java b/chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java
index bdbc679add1dc3b87d37d048cae98dd2c27f57ac..970eea13ed987c2dd8657c40ddd1b1cabec11627 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java
@@ -1077,6 +1077,10 @@ public class ChromeTabbedActivity extends ChromeActivity implements OverviewMode
             }
         } else if (id == R.id.downloads_menu_id) {
             DownloadActivity.launch(this);
+        } else if (id == R.id.open_recently_closed_tab) {
+            TabModel currentModel = mTabModelSelectorImpl.getCurrentModel();
+            if (!currentModel.isIncognito()) currentModel.openMostRecentlyClosedTab();
+            RecordUserAction.record("MobileOpenClosedTab");

[Theresa, 2016/07/12 00:06:16]

nit: Let's use AndroidTabCloseUndo.Keyboard to mirror AndroidTabCloseUndo.Toast
(used for the undo bar)

         } else {
             return super.onMenuOrKeyboardAction(id, fromMenu);
         }