Update the cached WindowAndroid in PermissionInfobar after reparenting

chrome/android/java/src/org/chromium/chrome/browser/infobar/GroupedPermissionInfoBar.java

Index: chrome/android/java/src/org/chromium/chrome/browser/infobar/GroupedPermissionInfoBar.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/infobar/GroupedPermissionInfoBar.java b/chrome/android/java/src/org/chromium/chrome/browser/infobar/GroupedPermissionInfoBar.java
index 7679128e4db466c3e46784b57c43f31b6c42f065..8ccf47b891d4b62635340dd4d47950cd8523ba3a 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/infobar/GroupedPermissionInfoBar.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/infobar/GroupedPermissionInfoBar.java
@@ -9,6 +9,7 @@ import android.support.v7.widget.SwitchCompat;
 import org.chromium.base.annotations.CalledByNative;
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.ResourceId;
+import org.chromium.chrome.browser.tab.Tab;
 import org.chromium.ui.base.WindowAndroid;
 
 import java.util.ArrayList;
@@ -20,9 +21,10 @@ public class GroupedPermissionInfoBar extends PermissionInfoBar {
     private final int[] mPermissionIcons;
     private final String[] mPermissionText;
     private final int[] mContentSettings;
-    private final WindowAndroid mWindowAndroid;
     private long mNativeGroupedPermissionInfoBar;
 
+    private WindowAndroid mWindowAndroid;
+
     GroupedPermissionInfoBar(String message, String buttonOk, String buttonCancel,
             int[] permissionIcons, String[] permissionText, WindowAndroid windowAndroid,
             int[] contentSettings) {
@@ -50,6 +52,11 @@ public class GroupedPermissionInfoBar extends PermissionInfoBar {
     }
 
     @Override
+    public void onTabReparented(Tab tab) {
+        mWindowAndroid = tab.getWindowAndroid();
+    }
+
+    @Override
     public void onButtonClicked(final boolean isPrimaryButton) {
         if (isPrimaryButton) {
             boolean[] toggleStatus = new boolean[mPermissionIcons.length];