Split "Online" and "Offline" AudioContext processing

Source/modules/webaudio/DeferredTaskHandler.cpp

Index: Source/modules/webaudio/DeferredTaskHandler.cpp
diff --git a/Source/modules/webaudio/DeferredTaskHandler.cpp b/Source/modules/webaudio/DeferredTaskHandler.cpp
index c2605c157caa2787a5da09895322d8aa52a7ff66..c4fe0a85b8106a51860d429c5456ffca718d7de2 100644
--- a/Source/modules/webaudio/DeferredTaskHandler.cpp
+++ b/Source/modules/webaudio/DeferredTaskHandler.cpp
@@ -26,7 +26,6 @@
 #if ENABLE(WEB_AUDIO)
 #include "modules/webaudio/DeferredTaskHandler.h"
 
-#include "modules/webaudio/AudioContext.h"
 #include "modules/webaudio/AudioNode.h"
 #include "modules/webaudio/AudioNodeOutput.h"
 #include "platform/ThreadSafeFunctional.h"
@@ -232,7 +231,7 @@ void DeferredTaskHandler::contextWillBeDestroyed()
     // Some handlers might live because of their cross thread tasks.
 }
 
-DeferredTaskHandler::AutoLocker::AutoLocker(AudioContext* context)
+DeferredTaskHandler::AutoLocker::AutoLocker(AbstractAudioContext* context)
     : m_handler(context->deferredTaskHandler())
 {
     m_handler.lock();