DynamicsCompressor.reduction is a float not an AudioParam

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 4be5421fcdf14140101819b2bbd3c082814805dc..ce43aebbc69391b075346c8bcb5f6be9041e27e8 100644
--- a/third_party/WebKit/Source/modules/webaudio/DynamicsCompressorNode.cpp
+++ b/third_party/WebKit/Source/modules/webaudio/DynamicsCompressorNode.cpp
@@ -33,15 +33,18 @@ static const unsigned defaultNumberOfOutputChannels = 2;
 namespace blink {
 
 DynamicsCompressorHandler::DynamicsCompressorHandler(
-    AudioNode& node, float sampleRate,
-    AudioParamHandler& threshold, AudioParamHandler& knee,
-    AudioParamHandler& ratio, AudioParamHandler& reduction,
-    AudioParamHandler& attack, AudioParamHandler& release)
+    AudioNode& node,
+    float sampleRate,
+    AudioParamHandler& threshold,
+    AudioParamHandler& knee,
+    AudioParamHandler& ratio,
+    AudioParamHandler& attack,
+    AudioParamHandler& release)
     : AudioHandler(NodeTypeDynamicsCompressor, node, sampleRate)
     , m_threshold(threshold)
     , m_knee(knee)
     , m_ratio(ratio)
-    , m_reduction(reduction)
+    , m_reduction(0)
     , m_attack(attack)
     , m_release(release)
 {
@@ -51,12 +54,22 @@ DynamicsCompressorHandler::DynamicsCompressorHandler(
 }
 
 PassRefPtr<DynamicsCompressorHandler> DynamicsCompressorHandler::create(
-    AudioNode& node, float sampleRate,
-    AudioParamHandler& threshold, AudioParamHandler& knee,
-    AudioParamHandler& ratio, AudioParamHandler& reduction,
-    AudioParamHandler& attack, AudioParamHandler& release)
-{
-    return adoptRef(new DynamicsCompressorHandler(node, sampleRate, threshold, knee, ratio, reduction, attack, release));
+    AudioNode& node,
+    float sampleRate,
+    AudioParamHandler& threshold,
+    AudioParamHandler& knee,
+    AudioParamHandler& ratio,
+    AudioParamHandler& attack,
+    AudioParamHandler& release)
+{
+    return adoptRef(new DynamicsCompressorHandler(
+        node,
+        sampleRate,
+        threshold,
+        knee,
+        ratio,
+        attack,
+        release));
 }
 
 DynamicsCompressorHandler::~DynamicsCompressorHandler()
@@ -83,8 +96,7 @@ void DynamicsCompressorHandler::process(size_t framesToProcess)
 
     m_dynamicsCompressor->process(input(0).bus(), outputBus, framesToProcess);
 
-    float reduction = m_dynamicsCompressor->parameterValue(DynamicsCompressor::ParamReduction);
-    m_reduction->setValue(reduction);
+    m_reduction = m_dynamicsCompressor->parameterValue(DynamicsCompressor::ParamReduction);
 }
 
 void DynamicsCompressorHandler::initialize()
@@ -98,7 +110,7 @@ void DynamicsCompressorHandler::initialize()
 
 void DynamicsCompressorHandler::clearInternalStateWhenDisabled()
 {
-    m_reduction->setValue(0);
+    m_reduction = 0;
 }
 
 double DynamicsCompressorHandler::tailTime() const
@@ -118,11 +130,17 @@ DynamicsCompressorNode::DynamicsCompressorNode(AbstractAudioContext& context, fl
     , m_threshold(AudioParam::create(context, -24))
     , m_knee(AudioParam::create(context, 30))
     , m_ratio(AudioParam::create(context, 12))
-    , m_reduction(AudioParam::create(context, 0))
     , m_attack(AudioParam::create(context, 0.003))
     , m_release(AudioParam::create(context, 0.250))
 {
-    setHandler(DynamicsCompressorHandler::create(*this, sampleRate, m_threshold->handler(), m_knee->handler(), m_ratio->handler(), m_reduction->handler(), m_attack->handler(), m_release->handler()));
+    setHandler(DynamicsCompressorHandler::create(
+        *this,
+        sampleRate,
+        m_threshold->handler(),
+        m_knee->handler(),
+        m_ratio->handler(),
+        m_attack->handler(),
+        m_release->handler()));
 }
 
 DynamicsCompressorNode* DynamicsCompressorNode::create(AbstractAudioContext& context, float sampleRate)
@@ -135,7 +153,6 @@ DEFINE_TRACE(DynamicsCompressorNode)
     visitor->trace(m_threshold);
     visitor->trace(m_knee);
     visitor->trace(m_ratio);
-    visitor->trace(m_reduction);
     visitor->trace(m_attack);
     visitor->trace(m_release);
     AudioNode::trace(visitor);
@@ -161,9 +178,9 @@ AudioParam* DynamicsCompressorNode::ratio() const
     return m_ratio;
 }
 
-AudioParam* DynamicsCompressorNode::reduction() const
+float DynamicsCompressorNode::reduction() const
 {
-    return m_reduction;
+    return dynamicsCompressorHandler().reductionValue();
 }
 
 AudioParam* DynamicsCompressorNode::attack() const