Revert of Add RoutingIDIssuer to help track routing id issues.

content/browser/renderer_host/routing_id_issuer.h

Index: content/browser/renderer_host/routing_id_issuer.h
diff --git a/content/browser/renderer_host/routing_id_issuer.h b/content/browser/renderer_host/routing_id_issuer.h
deleted file mode 100644
index 36fc452e0433d48bc63f3e7220576a765103d4a6..0000000000000000000000000000000000000000
--- a/content/browser/renderer_host/routing_id_issuer.h
+++ /dev/null
@@ -1,44 +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 CONTENT_BROWSER_RENDERER_HOST_ROUTING_ID_ISSUER_H_
-#define CONTENT_BROWSER_RENDERER_HOST_ROUTING_ID_ISSUER_H_
-
-#include "base/atomic_sequence_num.h"
-#include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/synchronization/lock.h"
-#include "content/common/content_export.h"
-#include "ipc/ipc_message.h"
-
-namespace content {
-
-// A debug facility for tightening the routing ID usage across multiple
-// RenderProcessHost. The tracked ID is used by RenderProcessHost
-// to verify if the given ID is correct.
-class CONTENT_EXPORT RoutingIDIssuer {
- public:
-  static scoped_ptr<RoutingIDIssuer> Create();
-  static scoped_ptr<RoutingIDIssuer> CreateWithMangler(int mangler);
-
-  int IssueNext();
-  bool IsProbablyValid(int issued_id) const;
-
- private:
-  friend class RoutingIDManglingDisabler;
-
-  static void DisableIDMangling();
-  static void EnableIDMangling();
-
-  explicit RoutingIDIssuer(int mangler);
-
-  base::AtomicSequenceNumber next_;
-  const int mangler_;
-
-  DISALLOW_COPY_AND_ASSIGN(RoutingIDIssuer);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_RENDERER_HOST_ROUTING_ID_ISSUER_H_