Recreate tab switcher stacks/lists when tabs are merged

chrome/android/java/src/org/chromium/chrome/browser/widget/OverviewListLayout.java

Index: chrome/android/java/src/org/chromium/chrome/browser/widget/OverviewListLayout.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/widget/OverviewListLayout.java b/chrome/android/java/src/org/chromium/chrome/browser/widget/OverviewListLayout.java
index 424b302d5dc31c8e71118efcc8bf3fd01d46a9dc..9a0f40d1e6fcbcfb2f5befe3796bc159808bafda 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/widget/OverviewListLayout.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/widget/OverviewListLayout.java
@@ -107,6 +107,15 @@ public class OverviewListLayout extends Layout implements AccessibilityTabModelA
     }
 
     @Override
+    public void onTabRestored(long time, int tabId) {
+        super.onTabRestored(time, tabId);
+        // Call show() so that new tabs and potentially the toggle between incognito and normal
+        // lists are created.
+        // TODO(twellington): add animation for showing the restored tab.
+        show(time, false);
+    }
+
+    @Override
     public void onTabModelSwitched(boolean incognito) {
         super.onTabModelSwitched(incognito);
         if (mTabModelWrapper == null) return;