Remove tools/clang (this will break things temporarily).

tools/clang/blink_gc_plugin/tests/weak_fields_require_tracing.h

Index: tools/clang/blink_gc_plugin/tests/weak_fields_require_tracing.h
diff --git a/tools/clang/blink_gc_plugin/tests/weak_fields_require_tracing.h b/tools/clang/blink_gc_plugin/tests/weak_fields_require_tracing.h
deleted file mode 100644
index c6850e6d2122559372474109dc8d628105f22115..0000000000000000000000000000000000000000
--- a/tools/clang/blink_gc_plugin/tests/weak_fields_require_tracing.h
+++ /dev/null
@@ -1,26 +0,0 @@
-// 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 WEAK_FIELDS_REQUIRE_TRACING_H_
-#define WEAK_FIELDS_REQUIRE_TRACING_H_
-
-#include "heap/stubs.h"
-
-namespace blink {
-
-class HeapObject : public GarbageCollected<HeapObject> {
-public:
-    void trace(Visitor*);
-    void clearWeakMembers(Visitor*);
-private:
-    Member<HeapObject> m_obj1;
-    WeakMember<HeapObject> m_obj2;
-    WeakMember<HeapObject> m_obj3;
-    HeapHashSet<WeakMember<HeapObject> > m_set1;
-    HeapHashSet<WeakMember<HeapObject> > m_set2;
-};
-
-}
-
-#endif