Remove AppRTCUtils.NonThreadSafe in AppRTC Android Demo

webrtc/examples/androidapp/src/org/appspot/apprtc/util/AppRTCUtils.java

 /*
  *  Copyright 2014 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 package org.appspot.apprtc.util;
 
 import android.os.Build;
 import android.util.Log;
 
 /**
  * AppRTCUtils provides helper functions for managing thread safety.
  */
 public final class AppRTCUtils {
 
   private AppRTCUtils() {
   }
 
-  /**
-   * NonThreadSafe is a helper class used to help verify that methods of a
-   * class are called from the same thread.
-   */
-  public static class NonThreadSafe {
-    private final Long threadId;
-
-    public NonThreadSafe() {
-      // Store thread ID of the creating thread.
-      threadId = Thread.currentThread().getId();
-    }
-
-   /** Checks if the method is called on the valid/creating thread. */
-    public boolean calledOnValidThread() {
-       return threadId.equals(Thread.currentThread().getId());
-    }
-  }
-
   /** Helper method which throws an exception  when an assertion has failed. */
   public static void assertIsTrue(boolean condition) {
     if (!condition) {
       throw new AssertionError("Expected condition to be true");
     }
   }
 
   /** Helper method for building a string of thread information.*/
   public static String getThreadInfo() {
     return "@[name=" + Thread.currentThread().getName()
         + ", id=" + Thread.currentThread().getId() + "]";
   }
 
   /** Information about the current build, taken from system properties. */
   public static void logDeviceInfo(String tag) {
     Log.d(tag, "Android SDK: " + Build.VERSION.SDK_INT + ", "
         + "Release: " + Build.VERSION.RELEASE + ", "
         + "Brand: " + Build.BRAND + ", "
         + "Device: " + Build.DEVICE + ", "
         + "Id: " + Build.ID + ", "
         + "Hardware: " + Build.HARDWARE + ", "
         + "Manufacturer: " + Build.MANUFACTURER + ", "
         + "Model: " + Build.MODEL + ", "
         + "Product: " + Build.PRODUCT);
   }
 }