Shortcut ctrl+shift+T added on android.

chrome/android/java/src/org/chromium/chrome/browser/tabmodel/TabModel.java

Index: chrome/android/java/src/org/chromium/chrome/browser/tabmodel/TabModel.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/tabmodel/TabModel.java b/chrome/android/java/src/org/chromium/chrome/browser/tabmodel/TabModel.java
index dced692244dd1757add5f1599c5bad8b8c3b3f09..67df33e207522055b1dc06c6b9e8e3e0d2d31ebd 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/tabmodel/TabModel.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/tabmodel/TabModel.java
@@ -148,6 +148,12 @@ public interface TabModel extends TabList {
     public void cancelTabClosure(int tabId);
 
     /**
+     * Opens the most recently closed tab, bringing the tab back into this model.
+     * If no tabs are currently in the rewound list, restore the tab from tab restore service.

[Theresa, 2016/06/30 20:50:24]

Sorry for the conflicting review comments - we should probably just drop the
second sentence since the implementation details (using the rewound list vs tab
restore service) are up to the implementing class. The interface shouldn't
dictate the implementation.

[xingliu, 2016/07/01 00:30:38]

Done.

+     */
+    public void openRecentlyClosedTab();

[Theresa, 2016/06/30 20:50:24]

To match the RecentlyClosedBridge, let's make this openMostRecentlyClosedTab();

[xingliu, 2016/07/01 00:30:38]

Done.

+
+    /**
      * @return The complete {@link TabList} this {@link TabModel} represents.  Note that this may
      *         be different than this actual {@link TabModel} if it supports pending closures
      *         {@link #supportsPendingClosures()}, as this will include all pending closure tabs.