Oilpan: build fix after r177435

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 98 matching lines @@
     size_t candidateID = oldestContextIndex();
     if (candidateID >= activeContexts().size())
         return;
 
     WebGLRenderingContextBase* candidate = activeContexts()[candidateID];
 
     // This context could belong to a dead page and the last JavaScript reference has already
     // been lost. Garbage collection might be triggered in the middle of this function, for
     // example, printWarningToConsole() causes an upcall to JavaScript.
     // Must make sure that the context is not deleted until the call stack unwinds.
-    RefPtr<WebGLRenderingContextBase> protect(candidate);
+    RefPtrWillBeRawPtr<WebGLRenderingContextBase> protect(candidate);
 
     activeContexts().remove(candidateID);
 
     candidate->printWarningToConsole(reason);
     InspectorInstrumentation::didFireWebGLWarning(candidate->canvas());
 
     // This will call deactivateContext once the context has actually been lost.
     candidate->forceLostContext(WebGLRenderingContextBase::SyntheticLostContext);
 }
 
@@ skipping 5564 matching lines @@
         if (m_textureUnits[i].m_texture2DBinding
             || m_textureUnits[i].m_textureCubeMapBinding) {
             m_onePlusMaxNonDefaultTextureUnit = i + 1;
             return;
         }
     }
     m_onePlusMaxNonDefaultTextureUnit = 0;
 }
 
 } // namespace WebCore