[Chromoting] Final SelfRemovableParameterRunnable

remoting/android/java/src/org/chromium/chromoting/Event.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.chromoting;
 
 import java.util.HashSet;
 
 /**
  * A thread-safe event queue which provides both {@link #add} and {@link #remove} functions with
@@ skipping 49 matching lines @@
         private void execute(Object obj, ParamT parameter) {
             ParameterRunnable<ParamT> runnable = (ParameterRunnable<ParamT>) obj;
             runnable.run(parameter);
         }
     }
 
     /**
      * A self removable {@link ParameterRunner}, uses a boolean {@link ParameterCallback} to decide
      * whether removes self from {@link Event} or not.
      */
-    private static class SelfRemovableParameterRunnable<ParamT>
+    private static final class SelfRemovableParameterRunnable<ParamT>
             implements ParameterRunnable<ParamT> {
         private final ParameterCallback<Boolean, ParamT> mCallback;
         private final Event<ParamT> mOwner;
 
         // This lock is used to make sure mEvent is correctly set before remove in run function.
         // i.e. mOwner.add and assigment of mEvent need to be atomic.
         private final Object mLock;
         private final Object mEvent;
 
         private SelfRemovableParameterRunnable(Event<ParamT> owner,
@@ skipping 86 matching lines @@
 
     /**
      * Returns true if there is no runnable attached to current instance.
      */
     public boolean isEmpty() {
         synchronized (mSet) {
             return mSet.isEmpty();
         }
     }
 }