[Android] Supporting floating select ActionModes for web content

android_webview/glue/java/src/com/android/webview/chromium/FloatingWebActionMode.java

-// Copyright 2015 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 com.android.webview.chromium;
-
-import android.view.ActionMode;
-
-import org.chromium.content.browser.WebActionMode;
-
-/**
- * An extension for WebActionMode that supports floating ActionModes.
- */
-public class FloatingWebActionMode extends WebActionMode {
-    public FloatingWebActionMode(ActionMode actionMode) {
-        super(actionMode);
-        assert actionMode.getType() == ActionMode.TYPE_FLOATING;
-    }
-
-    @Override
-    public void invalidateContentRect() {
-        mActionMode.invalidateContentRect();
-    }
-}