Remove redefinitions of ExceptionCode.

third_party/WebKit/Source/modules/webgl/WebGLContextGroup.h

 /*
  * Copyright (C) 2011 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 16 matching lines @@
 #define WebGLContextGroup_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "modules/webgl/WebGLRenderingContextBase.h"
 #include "wtf/HashSet.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 
 namespace blink {
 
-typedef int ExceptionCode;
-
 class WebGLContextGroup final : public GarbageCollected<WebGLContextGroup>,
                                 public TraceWrapperBase {
   WTF_MAKE_NONCOPYABLE(WebGLContextGroup);
 
  public:
   WebGLContextGroup();
 
   void addContext(WebGLRenderingContextBase*);
 
   // There's no point in having a removeContext method any more now that
@@ skipping 22 matching lines @@
   friend class WebGLObject;
 
   uint32_t m_numberOfContextLosses;
 
   HeapHashSet<TraceWrapperMember<WebGLRenderingContextBase>> m_contexts;
 };
 
 }  // namespace blink
 
 #endif  // WebGLContextGroup_h