clang/blink_gc_plugin: Replace 'WebCore' with 'blink'

tools/clang/blink_gc_plugin/tests/trace_after_dispatch.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef TRACE_AFTER_DISPATCH_H_
 #define TRACE_AFTER_DISPATCH_H_
 
 #include "heap/stubs.h"
 
-namespace WebCore {
+namespace blink {
 
 class A : public GarbageCollected<A> {
 public:
     void trace(Visitor*);
     void traceAfterDispatch(Visitor*);
 protected:
     enum Type { TB, TC, TD };
     A(Type type) : m_type(type) { }
 private:
     Type m_type;
@@ skipping 25 matching lines @@
 public:
     D() : Abstract(TD) { }
     void traceAfterDispatch(Visitor*);
 private:
     Member<A> m_a;
 };
 
 }
 
 #endif