[Android] Composited selection handle rendering

content/public/android/java/src/org/chromium/content/browser/input/CursorController.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.content.browser.input;
-
-import android.view.ViewTreeObserver;
-
-/**
- * A CursorController instance can be used to control a cursor in the text.
- */
-interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener {
-
-    /**
-     * Hide the cursor controller from screen.
-     */
-    void hide();
-
-    /**
-     * @return true if the CursorController is currently visible
-     */
-    boolean isShowing();
-
-    /**
-     * Called when the handle is about to start updating its position.
-     * @param handle
-     */
-    void beforeStartUpdatingPosition(HandleView handle);
-
-    /**
-     * Update the controller's position.
-     */
-    void updatePosition(HandleView handle, int x, int y);
-
-    /**
-     * Called when the view is detached from window. Perform house keeping task, such as
-     * stopping Runnable thread that would otherwise keep a reference on the context, thus
-     * preventing the activity to be recycled.
-     */
-    void onDetached();
-}