Define default values for options dictionaries for WebAudio

third_party/WebKit/Source/modules/webaudio/DelayNode.cpp

 /*
  * Copyright (C) 2010, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 77 matching lines @@
                              const DelayOptions& options,
                              ExceptionState& exception_state) {
   // maxDelayTime has a default value specified.
   DelayNode* node = Create(*context, options.maxDelayTime(), exception_state);
 
   if (!node)
     return nullptr;
 
   node->HandleChannelOptions(options, exception_state);
 
-  if (options.hasDelayTime())
-    node->delayTime()->setValue(options.delayTime());
+  node->delayTime()->setValue(options.delayTime());
 
   return node;
 }
 
 AudioParam* DelayNode::delayTime() {
   return delay_time_;
 }
 
 DEFINE_TRACE(DelayNode) {
   visitor->Trace(delay_time_);
   AudioNode::Trace(visitor);
 }
 
 }  // namespace blink