Implement SmartText selection.

content/public/android/java/src/org/chromium/content/browser/ContextSelectionProvider.java

 // Copyright 2017 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;
 
 import android.content.Intent;
 import android.graphics.drawable.Drawable;
 import android.view.View.OnClickListener;
 
@@ skipping 32 matching lines @@
 
         /**
          * Intent for the suggested menu item.
          */
         public Intent intent;
 
         /**
          * OnClickListener for the suggested menu item.
          */
         public OnClickListener onClickListener;
+
+        /**
+         * A helper method that returns true if the result has both visual info
+         * and an action so that, for instance, one can make a new menu item.
+         */
+        public boolean hasNamedAction() {
+            return (label != null || icon != null) && (intent != null || onClickListener != null);
+        }
     }
 
     /**
      * The interface that returns the result of the selected text analysis.
      */
     public interface ResultCallback {
         /**
          * The result is delivered with this method.
          */
         void onClassified(Result result);
@@ skipping 16 matching lines @@
      * @param end   The index pointing to the first character that comes after
      *              the selected text inside the textual context.
      */
     public void sendClassifyRequest(CharSequence text, int start, int end);
 
     /**
      * Cancel all asynchronous requests.
      */
     public void cancelAllRequests();
 }