Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/modules/mediasource/SourceBuffer.cpp

 /*
  * Copyright (C) 2013 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 521 matching lines @@
 
 bool SourceBuffer::isRemoved() const
 {
     return !m_source;
 }
 
 void SourceBuffer::scheduleEvent(const AtomicString& eventName)
 {
     ASSERT(m_asyncEventQueue);
 
-    RefPtrWillBeRawPtr<Event> event = Event::create(eventName);
+    RawPtr<Event> event = Event::create(eventName);
     event->setTarget(this);
 
     m_asyncEventQueue->enqueueEvent(event.release());
 }
 
 bool SourceBuffer::prepareAppend(size_t newDataSize, ExceptionState& exceptionState)
 {
     TRACE_EVENT_ASYNC_BEGIN0("media", "SourceBuffer::prepareAppend", this);
     // http://w3c.github.io/media-source/#sourcebuffer-prepare-append
     // 3.5.4 Prepare Append Algorithm
@@ skipping 317 matching lines @@
     visitor->trace(m_asyncEventQueue);
     visitor->trace(m_appendBufferAsyncPartRunner);
     visitor->trace(m_removeAsyncPartRunner);
     visitor->trace(m_appendStreamAsyncPartRunner);
     visitor->trace(m_stream);
     RefCountedGarbageCollectedEventTargetWithInlineData<SourceBuffer>::trace(visitor);
     ActiveDOMObject::trace(visitor);
 }
 
 } // namespace blink