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

tools/clang/blink_gc_plugin/tests/fields_require_tracing.cpp

Index: tools/clang/blink_gc_plugin/tests/fields_require_tracing.cpp
diff --git a/tools/clang/blink_gc_plugin/tests/fields_require_tracing.cpp b/tools/clang/blink_gc_plugin/tests/fields_require_tracing.cpp
deleted file mode 100644
index 880ce1e9d6791c98eed60c6ccc2cfd9e2063aae4..0000000000000000000000000000000000000000
--- a/tools/clang/blink_gc_plugin/tests/fields_require_tracing.cpp
+++ /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.
-
-#include "fields_require_tracing.h"
-
-namespace blink {
-
-void PartObject::trace(Visitor* visitor) {
-    m_obj1->trace(visitor); // Don't allow direct tracing.
-    visitor->trace(m_obj2);
-    // Missing visitor->trace(m_obj3);
-    visitor->trace(m_parts);
-}
-
-void PartBObject::trace(Visitor* visitor) {
-  // Missing visitor->trace(m_set);
-  visitor->trace(m_vector);
-}
-
-void HeapObject::trace(Visitor* visitor) {
-    // Missing visitor->trace(m_part);
-    visitor->trace(m_obj);
-}
-
-}