Clean up remaining uses of WebCore namespace

Source/core/html/canvas/WebGLVertexArrayObjectOES.h

 /*
  * 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 88 matching lines @@
     VaoType m_type;
     bool m_hasEverBeenBound;
     RefPtrWillBeMember<WebGLBuffer> m_boundElementArrayBuffer;
     WillBeHeapVector<VertexAttribState> m_vertexAttribState;
 };
 
 } // namespace blink
 
 namespace WTF {
 template<>
-struct VectorTraits<WebCore::WebGLVertexArrayObjectOES::VertexAttribState> : SimpleClassVectorTraits<WebCore::WebGLVertexArrayObjectOES::VertexAttribState> {
+struct VectorTraits<blink::WebGLVertexArrayObjectOES::VertexAttribState> : SimpleClassVectorTraits<blink::WebGLVertexArrayObjectOES::VertexAttribState> {
     // Specialization needed as the VertexAttribState's struct fields
     // aren't handled as desired by the IsPod() trait.
 #if ENABLE(OILPAN)
     static const bool needsDestruction = false;
 #endif
     // Must use the constructor.
     static const bool canInitializeWithMemset = false;
     static const bool canCopyWithMemcpy = true;
 };
 }
 
 #endif // WebGLVertexArrayObjectOES_h