Don't delete the PermissionPromptAndroid when switching tabs

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

 // Copyright 2014 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.tabmodel;
 
 import org.chromium.base.ObserverList;
 import org.chromium.chrome.browser.tab.Tab;
 import org.chromium.chrome.browser.tabmodel.TabModel.TabLaunchType;
 import org.chromium.chrome.browser.tabmodel.TabModel.TabSelectionType;
-import org.chromium.content_public.browser.WebContents;
 
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 
 /**
  * Implement methods shared across the different model implementations.
  */
 public abstract class TabModelSelectorBase implements TabModelSelector {
     public static final int NORMAL_TAB_MODEL_INDEX = 0;
@@ skipping 25 matching lines @@
         TabModelObserver tabModelObserver = new EmptyTabModelObserver() {
             @Override
             public void didAddTab(Tab tab, TabLaunchType type) {
                 notifyChanged();
                 notifyNewTabCreated(tab);
             }
 
             @Override
             public void didSelectTab(Tab tab, TabSelectionType type, int lastId) {
                 notifyChanged();
-
-                Tab oldTab = getTabById(lastId);
-                if (tab.getId() != lastId) {
-                    WebContents oldWebContents = (oldTab == null) ? null : oldTab.getWebContents();
-                    nativeOnActiveTabChanged(oldWebContents, tab.getWebContents());
-                }
             }
 
             @Override
             public void didMoveTab(Tab tab, int newIndex, int curIndex) {
                 notifyChanged();
             }
         };
         for (TabModel model : models) {
             model.addObserver(tabModelObserver);
         }
@@ skipping 169 matching lines @@
 
     /**
      * Notifies all the listeners that a new tab has been created.
      * @param tab The tab that has been created.
      */
     private void notifyNewTabCreated(Tab tab) {
         for (TabModelSelectorObserver listener : mObservers) {
             listener.onNewTabCreated(tab);
         }
     }
-
-    static native void nativeOnActiveTabChanged(WebContents oldContents, WebContents newContents);
 }