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

tools/clang/blink_gc_plugin/tests/class_requires_finalization_base.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 CLASS_REQUIRES_FINALIZATION_BASE_H_
 #define CLASS_REQUIRES_FINALIZATION_BASE_H_
 
 #include "heap/stubs.h"
 
-namespace WebCore {
+namespace blink {
 
 class A : public GarbageCollected<A> {
 public:
     virtual void trace(Visitor*) {}
 };
 
 class B {
 public:
     ~B() { /* user-declared, thus, non-trivial */ }
 };
@@ skipping 20 matching lines @@
     : public GCedClassWithAScriptWrappableBase
     , public B
     , public ScriptWrappable {
 public:
     void trace(Visitor*);
 };
 
 }
 
 #endif