Remove NewRequiredCallback.

ppapi/examples/audio_input/audio_input.cc

 // Copyright (c) 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.
 
 #include <string.h>
 
 #include <algorithm>
 #include <limits>
 
 #include "ppapi/cpp/audio_config.h"
@@ skipping 62 matching lines @@
       return;
 
     Paint();
   }
 
  private:
   void ScheduleNextTimer() {
     PP_DCHECK(timer_interval_ > 0);
     pp::Module::Get()->core()->CallOnMainThread(
         timer_interval_,
-        callback_factory_.NewRequiredCallback(&MyInstance::OnTimer),
+        callback_factory_.NewCallback(&MyInstance::OnTimer),
         0);
   }
 
   void OnTimer(int32_t) {
     ScheduleNextTimer();
     Paint();
   }
 
   void DidFlush(int32_t result) {
     waiting_for_flush_completion_ = false;
@@ skipping 10 matching lines @@
     pending_paint_ = false;
 
     if (size_.IsEmpty())
       return;  // Nothing to do.
 
     pp::ImageData image = PaintImage(size_);
     if (!image.is_null()) {
       device_context_.ReplaceContents(&image);
       waiting_for_flush_completion_ = true;
       device_context_.Flush(
-          callback_factory_.NewRequiredCallback(&MyInstance::DidFlush));
+          callback_factory_.NewCallback(&MyInstance::DidFlush));
     }
   }
 
   pp::ImageData PaintImage(const pp::Size& size) {
     pp::ImageData image(this, PP_IMAGEDATAFORMAT_BGRA_PREMUL, size, false);
     if (image.is_null())
       return image;
 
     // Clear to dark grey.
     for (int y = 0; y < size.height(); y++) {
@@ skipping 61 matching lines @@
 };
 
 namespace pp {
 
 // Factory function for your specialization of the Module object.
 Module* CreateModule() {
   return new MyModule();
 }
 
 }  // namespace pp