Fix AudioNode.disconnect() to support selective disconnection.

Source/modules/webaudio/AudioNodeOutput.cpp

Index: Source/modules/webaudio/AudioNodeOutput.cpp
diff --git a/Source/modules/webaudio/AudioNodeOutput.cpp b/Source/modules/webaudio/AudioNodeOutput.cpp
index 1fe40b2379f3c87c713c5dcc6a4ab39ebf9736e2..754a442542271eceecd70def60ec89be27b0bafc 100644
--- a/Source/modules/webaudio/AudioNodeOutput.cpp
+++ b/Source/modules/webaudio/AudioNodeOutput.cpp
@@ -190,6 +190,18 @@ void AudioNodeOutput::disconnectAllInputs()
         m_inputs.begin()->key->disconnect(*this);
 }
 
+void AudioNodeOutput::disconnectInput(AudioNodeInput& input)
+{
+    ASSERT(context()->isGraphOwner() && isConnectedToInput(input));
+    input.disconnect(*this);
+}
+
+void AudioNodeOutput::disconnectAudioParam(AudioParam& param)
+{
+    ASSERT(context()->isGraphOwner() && isConnectedToAudioParam(param));
+    param.disconnect(*this);
+}
+
 void AudioNodeOutput::addParam(AudioParam& param)
 {
     ASSERT(context()->isGraphOwner());
@@ -217,6 +229,18 @@ void AudioNodeOutput::disconnectAll()
     disconnectAllParams();
 }
 
+bool AudioNodeOutput::isConnectedToInput(AudioNodeInput& input)
+{
+    ASSERT(context()->isGraphOwner());
+    return m_inputs.contains(&input);
+}
+
+bool AudioNodeOutput::isConnectedToAudioParam(AudioParam& param)
+{
+    ASSERT(context()->isGraphOwner());
+    return m_params.contains(&param);
+}
+
 void AudioNodeOutput::disable()
 {
     ASSERT(context()->isGraphOwner());