Define default values for options dictionaries for WebAudio

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

 /*
  * Copyright (C) 2011, 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 173 matching lines @@
     BaseAudioContext* context,
     const DynamicsCompressorOptions& options,
     ExceptionState& exception_state) {
   DynamicsCompressorNode* node = Create(*context, exception_state);
 
   if (!node)
     return nullptr;
 
   node->HandleChannelOptions(options, exception_state);
 
-  if (options.hasAttack())
-    node->attack()->setValue(options.attack());
-  if (options.hasKnee())
-    node->knee()->setValue(options.knee());
-  if (options.hasRatio())
-    node->ratio()->setValue(options.ratio());
-  if (options.hasRelease())
-    node->release()->setValue(options.release());
-  if (options.hasThreshold())
-    node->threshold()->setValue(options.threshold());
+  node->attack()->setValue(options.attack());
+  node->knee()->setValue(options.knee());
+  node->ratio()->setValue(options.ratio());
+  node->release()->setValue(options.release());
+  node->threshold()->setValue(options.threshold());
 
   return node;
 }
 
 DEFINE_TRACE(DynamicsCompressorNode) {
   visitor->Trace(threshold_);
   visitor->Trace(knee_);
   visitor->Trace(ratio_);
   visitor->Trace(attack_);
   visitor->Trace(release_);
@@ skipping 23 matching lines @@
 
 AudioParam* DynamicsCompressorNode::attack() const {
   return attack_;
 }
 
 AudioParam* DynamicsCompressorNode::release() const {
   return release_;
 }
 
 }  // namespace blink