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

tools/clang/blink_gc_plugin/tests/traceimpl_omitted_trace.h

Index: tools/clang/blink_gc_plugin/tests/traceimpl_omitted_trace.h
diff --git a/tools/clang/blink_gc_plugin/tests/traceimpl_omitted_trace.h b/tools/clang/blink_gc_plugin/tests/traceimpl_omitted_trace.h
deleted file mode 100644
index 3c5e9559527d397ab01076a088ff1c234d6db89a..0000000000000000000000000000000000000000
--- a/tools/clang/blink_gc_plugin/tests/traceimpl_omitted_trace.h
+++ /dev/null
@@ -1,47 +0,0 @@
-// Copyright 2015 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 TRACEIMPL_OMITTED_TRACE_H_
-#define TRACEIMPL_OMITTED_TRACE_H_
-
-#include "heap/stubs.h"
-
-namespace blink {
-
-class A : public GarbageCollected<A> {
- public:
-  virtual void trace(Visitor* visitor) { traceImpl(visitor); }
-  virtual void trace(InlinedGlobalMarkingVisitor visitor) {
-    traceImpl(visitor);
-  }
-
- private:
-  template <typename VisitorDispatcher>
-  void traceImpl(VisitorDispatcher visitor) {}
-};
-
-class B : public A {
-  // trace() isn't necessary because we've got nothing to trace here.
-};
-
-class C : public B {
- public:
-  void trace(Visitor* visitor) override { traceImpl(visitor); }
-  void trace(InlinedGlobalMarkingVisitor visitor) override {
-    traceImpl(visitor);
-  }
-
- private:
-  template <typename VisitorDispatcher>
-  void traceImpl(VisitorDispatcher visitor) {
-    // B::trace() is actually A::trace(), and in certain cases we only get
-    // limited information like "there is a function call that will be resolved
-    // to A::trace()". We still want to mark B as traced.
-    B::trace(visitor);
-  }
-};
-
-}
-
-#endif  // TRACEIMPL_OMITTED_TRACE_H_