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

tools/clang/blink_gc_plugin/tests/non_virtual_trace.cpp

Index: tools/clang/blink_gc_plugin/tests/non_virtual_trace.cpp
diff --git a/tools/clang/blink_gc_plugin/tests/non_virtual_trace.cpp b/tools/clang/blink_gc_plugin/tests/non_virtual_trace.cpp
deleted file mode 100644
index 9f5771193c9481376459577261f16880f5e7d578..0000000000000000000000000000000000000000
--- a/tools/clang/blink_gc_plugin/tests/non_virtual_trace.cpp
+++ /dev/null
@@ -1,23 +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.
-
-#include "non_virtual_trace.h"
-
-namespace blink {
-
-void A::trace(Visitor* visitor)
-{
-}
-
-void C::trace(Visitor* visitor)
-{
-    B::trace(visitor);
-}
-
-void D::trace(Visitor* visitor)
-{
-    B::trace(visitor);
-}
-
-}