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

tools/clang/blink_gc_plugin/tests/base_class_must_define_virtual_trace.h

Index: tools/clang/blink_gc_plugin/tests/base_class_must_define_virtual_trace.h
diff --git a/tools/clang/blink_gc_plugin/tests/base_class_must_define_virtual_trace.h b/tools/clang/blink_gc_plugin/tests/base_class_must_define_virtual_trace.h
deleted file mode 100644
index 16558bb85084fb6884ae8413ddceae543b52d4a5..0000000000000000000000000000000000000000
--- a/tools/clang/blink_gc_plugin/tests/base_class_must_define_virtual_trace.h
+++ /dev/null
@@ -1,38 +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 BASE_CLASS_MUST_DEFINE_VIRTUAL_TRACE_H_
-#define BASE_CLASS_MUST_DEFINE_VIRTUAL_TRACE_H_
-
-#include "heap/stubs.h"
-
-namespace blink {
-
-class PartBase {
-    DISALLOW_ALLOCATION();
-    // Missing virtual trace.
-};
-
-class PartDerived : public PartBase {
-    DISALLOW_ALLOCATION();
-public:
-    virtual void trace(Visitor*);
-};
-
-class HeapBase : public GarbageCollected<HeapBase> {
-    // Missing virtual trace.
-};
-
-
-class HeapDerived : public HeapBase {
-public:
-    virtual void trace(Visitor*);
-private:
-    PartDerived m_part;
-};
-
-
-}
-
-#endif