Fix leaking of AddToHomescreenManager for WebAPKs.

chrome/android/java/src/org/chromium/chrome/browser/webapps/AddToHomescreenManager.java

 // Copyright 2016 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.webapps;
 
 import android.app.Activity;
 import android.graphics.Bitmap;
 
 import org.chromium.base.annotations.CalledByNative;
@@ skipping 50 matching lines @@
     }
 
     /**
      * Adds a shortcut for the current Tab.
      * @param userRequestedTitle Title of the shortcut displayed on the homescreen.
      */
     public void addShortcut(String userRequestedTitle) {
         nativeAddShortcut(mNativeAddToHomescreenManager, userRequestedTitle);
     }
 
-    public void onDismissed() {
+    @CalledByNative
+    public void onFinished() {
         destroy();
     }
 
     /**
      * Shows alert to prompt user for name of home screen shortcut.
      */
     @CalledByNative
     public void showDialog() {
         AddToHomescreenDialog dialog = new AddToHomescreenDialog(this);
         dialog.show(mActivity);
         setObserver(dialog);
     }
 
     @CalledByNative
     private void onUserTitleAvailable(String title) {
         mObserver.onUserTitleAvailable(title);
     }
 
     @CalledByNative
     private void onReadyToAdd(Bitmap icon) {
         mObserver.onReadyToAdd(icon);
     }
 
     private native long nativeInitializeAndStart(WebContents webContents);
     private native void nativeAddShortcut(
             long nativeAddToHomescreenManager, String userRequestedTitle);
     private native void nativeDestroy(long nativeAddToHomescreenManager);
 }