Oilpan: Replace most of RefPtrs for Event objects with oilpan's transition types

Source/core/html/canvas/WebGLRenderingContextBase.cpp

 /*
  * Copyright (C) 2009 Apple 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 5321 matching lines @@
         break;
     }
     VertexAttribValue& attribValue = m_vertexAttribValue[index];
     attribValue.initValue();
     for (int ii = 0; ii < expectedSize; ++ii)
         attribValue.value[ii] = v[ii];
 }
 
 void WebGLRenderingContextBase::dispatchContextLostEvent(Timer<WebGLRenderingContextBase>*)
 {
-    RefPtr<WebGLContextEvent> event = WebGLContextEvent::create(EventTypeNames::webglcontextlost, false, true, "");
+    RefPtrWillBeRawPtr<WebGLContextEvent> event = WebGLContextEvent::create(EventTypeNames::webglcontextlost, false, true, "");
     canvas()->dispatchEvent(event);
     m_restoreAllowed = event->defaultPrevented();
     deactivateContext(this, m_contextLostMode != RealLostContext && m_restoreAllowed);
     if ((m_contextLostMode == RealLostContext || m_contextLostMode == AutoRecoverSyntheticLostContext) && m_restoreAllowed)
         m_restoreTimer.startOneShot(0, FROM_HERE);
 }
 
 void WebGLRenderingContextBase::maybeRestoreContext(Timer<WebGLRenderingContextBase>*)
 {
     ASSERT(isContextLost());
@@ skipping 244 matching lines @@
         if (m_textureUnits[i].m_texture2DBinding
             || m_textureUnits[i].m_textureCubeMapBinding) {
             m_onePlusMaxNonDefaultTextureUnit = i + 1;
             return;
         }
     }
     m_onePlusMaxNonDefaultTextureUnit = 0;
 }
 
 } // namespace WebCore