Implement suspend/resume for AudioContext

Source/modules/webaudio/OfflineAudioDestinationNode.cpp

Index: Source/modules/webaudio/OfflineAudioDestinationNode.cpp
diff --git a/Source/modules/webaudio/OfflineAudioDestinationNode.cpp b/Source/modules/webaudio/OfflineAudioDestinationNode.cpp
index 11da9795e4cf972a1fcbed453aa202951df33f0a..8d51fff042af1a7611ae974dad5927c6f105a2ce 100644
--- a/Source/modules/webaudio/OfflineAudioDestinationNode.cpp
+++ b/Source/modules/webaudio/OfflineAudioDestinationNode.cpp
@@ -92,6 +92,11 @@ void OfflineAudioDestinationNode::startRendering()
     }
 }
 
+void OfflineAudioDestinationNode::stopRendering()
+{
+    ASSERT_NOT_REACHED();
+}
+
 void OfflineAudioDestinationNode::offlineRender()
 {
     ASSERT(!isMainThread());