Split "Online" and "Offline" AudioContext processing

Source/modules/webaudio/AudioParamTimeline.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 161 matching lines @@
 
     // Remove all events starting at startTime.
     for (unsigned i = 0; i < m_events.size(); ++i) {
         if (m_events[i].time() >= startTime) {
             m_events.remove(i, m_events.size() - i);
             break;
         }
     }
 }
 
-float AudioParamTimeline::valueForContextTime(AudioContext* context, float defaultValue, bool& hasValue)
+float AudioParamTimeline::valueForContextTime(AbstractAudioContext* context, float defaultValue, bool& hasValue)
 {
     ASSERT(context);
 
     {
         MutexTryLocker tryLocker(m_eventsLock);
         if (!tryLocker.locked() || !context || !m_events.size() || context->currentTime() < m_events[0].time()) {
             hasValue = false;
             return defaultValue;
         }
     }
@@ skipping 235 matching lines @@
     // to the end of the values buffer.
     for (; writeIndex < numberOfValues; ++writeIndex)
         values[writeIndex] = value;
 
     return value;
 }
 
 } // namespace blink
 
 #endif // ENABLE(WEB_AUDIO)