[blimp] Add support for having multiple tabs

chrome/android/java/src/org/chromium/chrome/browser/widget/emptybackground/EmptyBackgroundViewTablet.java

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.chrome.browser.widget.emptybackground;
 
 import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
 import android.animation.ObjectAnimator;
 import android.content.Context;
@@ skipping 41 matching lines @@
 
     @Override
     public void onFinishInflate() {
         super.onFinishInflate();
 
         View newTabButton = findViewById(R.id.empty_new_tab_button);
         newTabButton.setOnClickListener(new OnClickListener() {
             @Override
             public void onClick(View v) {
                 if (mTabCreator == null) return;
+                mTabModelSelector.getModel(false).commitAllTabClosures();
                 mTabCreator.launchNTP();
             }
         });
 
         buildAnimatorSets();
     }
 
     /**
      * Sets the {@link TabModelSelector} that will be queried for information about the state of
      * the system.
@@ skipping 92 matching lines @@
 
             @Override
             public void onAnimationEnd(Animator animation) {
                 setVisibility(View.GONE);
                 mCurrentTransitionAnimation = null;
                 mIncognitoToggleButton.setEnabled(true);
             }
         });
     }
 }