Made AudioNode an EventTarget

Source/modules/webaudio/AudioNode.cpp

Index: Source/modules/webaudio/AudioNode.cpp
diff --git a/Source/modules/webaudio/AudioNode.cpp b/Source/modules/webaudio/AudioNode.cpp
index e2c93c0683e820652cadc5497b0789b05f0d49a1..66c9566c495b3664093e767604295ef2426be46f 100644
--- a/Source/modules/webaudio/AudioNode.cpp
+++ b/Source/modules/webaudio/AudioNode.cpp
@@ -45,7 +45,8 @@
 namespace WebCore {
 
 AudioNode::AudioNode(AudioContext* context, float sampleRate)
-    : m_isInitialized(false)
+    : ActiveDOMObject(context->scriptExecutionContext())
+    , m_isInitialized(false)
     , m_nodeType(NodeTypeUnknown)
     , m_context(context)
     , m_sampleRate(sampleRate)
@@ -65,6 +66,11 @@ AudioNode::AudioNode(AudioContext* context, float sampleRate)
         atexit(AudioNode::printNodeCounts);
     }
 #endif
+
+    // since we're just using the ActiveDOMObject instance for GC,
+    // we can suspendIfNeeded here. suspendIfNeeded needs to be called
+    // at some point on every ActiveDOMObject.
+    suspendIfNeeded();
 }
 
 AudioNode::~AudioNode()
@@ -282,10 +288,26 @@ void AudioNode::updateChannelsForInputs()
         input(i)->changedOutputs();
 }
 
+const AtomicString& AudioNode::interfaceName() const
+{
+    return eventNames().interfaceForAudioNode;
+}
+
+ScriptExecutionContext* AudioNode::scriptExecutionContext() const
+{
+    return const_cast<AudioNode*>(this)->context()->scriptExecutionContext();
+}
+
+
+bool AudioNode::hasPendingActivity() const
+{
+    return !m_isDisabled && (m_connectionRefCount > 0);
+}
+
 void AudioNode::processIfNecessary(size_t framesToProcess)
 {
     ASSERT(context()->isAudioThread());
-    
+
     if (!isInitialized())
         return;