Define default values for options dictionaries for WebAudio

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

Index: third_party/WebKit/Source/modules/webaudio/DynamicsCompressorNode.cpp
diff --git a/third_party/WebKit/Source/modules/webaudio/DynamicsCompressorNode.cpp b/third_party/WebKit/Source/modules/webaudio/DynamicsCompressorNode.cpp
index 788df87773b145f8d31f755dbce865829592f308..77b8fd590f0edb7eed5e04496d00af270a8028f1 100644
--- a/third_party/WebKit/Source/modules/webaudio/DynamicsCompressorNode.cpp
+++ b/third_party/WebKit/Source/modules/webaudio/DynamicsCompressorNode.cpp
@@ -191,16 +191,11 @@ DynamicsCompressorNode* DynamicsCompressorNode::Create(
 
   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;
 }