Implement suspend() and resume() for OfflineAudioContext

Source/modules/webaudio/AbstractAudioContext.cpp

Index: Source/modules/webaudio/AbstractAudioContext.cpp
diff --git a/Source/modules/webaudio/AbstractAudioContext.cpp b/Source/modules/webaudio/AbstractAudioContext.cpp
index 02c46d9010798b899d662f57418bb3ec9cb0a078..ee0a504e3f392b580963e2360c6989c607d20301 100644
--- a/Source/modules/webaudio/AbstractAudioContext.cpp
+++ b/Source/modules/webaudio/AbstractAudioContext.cpp
@@ -826,33 +826,8 @@ void AbstractAudioContext::startRendering()
     }
 }
 
-void AbstractAudioContext::fireCompletionEvent()
-{
-    ASSERT(isMainThread());
-    if (!isMainThread())
-        return;
-
-    AudioBuffer* renderedBuffer = m_renderTarget.get();
-
-    // For an offline context, we set the state to closed here so that the oncomplete handler sees
-    // that the context has been closed.
-    setContextState(Closed);
-
-    ASSERT(renderedBuffer);
-    if (!renderedBuffer)
-        return;
-
-    // Avoid firing the event if the document has already gone away.
-    if (executionContext()) {
-        // Call the offline rendering completion event listener and resolve the promise too.
-        dispatchEvent(OfflineAudioCompletionEvent::create(renderedBuffer));
-        m_offlineResolver->resolve(renderedBuffer);
-    }
-}
-
 DEFINE_TRACE(AbstractAudioContext)
 {
-    visitor->trace(m_offlineResolver);
     visitor->trace(m_renderTarget);
     visitor->trace(m_destinationNode);
     visitor->trace(m_listener);