Factor out ContentViewAndroidDelegate

ui/android/java/src/org/chromium/ui/base/ViewAndroidDelegate.java

 // Copyright 2012 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.ui.base;
 
 import android.view.View;
 
 /**
  * Interface to acquire and release anchor views from the implementing View.
  */
 public interface ViewAndroidDelegate {
 
     /**
-     * @return An anchor view that can be used to anchor decoration views like Autofill popup.
-     */
-    View acquireAnchorView();
-
-    /**
-     * Set the anchor view to specified position and width (all units in dp).
-     * @param view The anchor view that needs to be positioned.
+     * Add a view used to anchor decoration views like Autofill popup, and
+     * set the anchor view to specified position and width (all units in dp).
+     * @param anchorView The anchor view that needs to be positioned.
      * @param x X coordinate of the top left corner of the anchor view.
      * @param y Y coordinate of the top left corner of the anchor view.
      * @param width The width of the anchor view.
      * @param height The height of the anchor view.
+     * @return A newly added view
      */
-    void setAnchorViewPosition(View view, float x, float y, float width, float height);
+    void addView(View anchorView, float x, float y, float width, float height);
 
     /**
      * Release given anchor view.
      * @param anchorView The anchor view that needs to be released.
      */
     void releaseAnchorView(View anchorView);
 }