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

tools/clang/blink_gc_plugin/TracingStatus.h

Index: tools/clang/blink_gc_plugin/TracingStatus.h
diff --git a/tools/clang/blink_gc_plugin/TracingStatus.h b/tools/clang/blink_gc_plugin/TracingStatus.h
deleted file mode 100644
index 9eb1080de85d13845a910530b559d739883ebe6b..0000000000000000000000000000000000000000
--- a/tools/clang/blink_gc_plugin/TracingStatus.h
+++ /dev/null
@@ -1,29 +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 TOOLS_BLINK_GC_PLUGIN_TRACING_STATUS_H_
-#define TOOLS_BLINK_GC_PLUGIN_TRACING_STATUS_H_
-
-// TracingStatus is a three-point value ordered by unneeded < unknown < needed.
-class TracingStatus {
- public:
-  static TracingStatus Unneeded() { return kUnneeded; }
-  static TracingStatus Unknown() { return kUnknown; }
-  static TracingStatus Needed() { return kNeeded; }
-  bool IsUnneeded() const { return status_ == kUnneeded; }
-  bool IsUnknown() const { return status_ == kUnknown; }
-  bool IsNeeded() const { return status_ == kNeeded; }
-  TracingStatus LUB(const TracingStatus& other) const {
-    return status_ > other.status_ ? status_ : other.status_;
-  }
-  bool operator==(const TracingStatus& other) const {
-    return status_ == other.status_;
-  }
- private:
-  enum Status { kUnneeded, kUnknown, kNeeded };
-  TracingStatus(Status status) : status_(status) {}
-  Status status_;
-};
-
-#endif // TOOLS_BLINK_GC_PLUGIN_TRACING_STATUS_H_