Revert of Add RoutingIDIssuer to help track routing id issues.

content/browser/renderer_host/routing_id_issuer.cc

Index: content/browser/renderer_host/routing_id_issuer.cc
diff --git a/content/browser/renderer_host/routing_id_issuer.cc b/content/browser/renderer_host/routing_id_issuer.cc
deleted file mode 100644
index dbcb7f97f16d350589e462288f96af47d0ba8559..0000000000000000000000000000000000000000
--- a/content/browser/renderer_host/routing_id_issuer.cc
+++ /dev/null
@@ -1,61 +0,0 @@
-// Copyright (c) 2012 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 "content/browser/renderer_host/routing_id_issuer.h"
-
-namespace content {
-
-namespace {
-
-const int kManglerBits = 6;
-const int kIDBits = 31 - kManglerBits;
-const int kManglerWrap = 1 << kManglerBits;
-const int kIDWrap = 1 << kIDBits;
-const int kIDMask = kIDWrap - 1;
-
-static base::StaticAtomicSequenceNumber g_manglerSequence;
-static int g_disablingIDManglingCount = 0;
-
-int GetNextMangler() {
-  // Does +1 to always gives some mangler.
-  return (g_manglerSequence.GetNext() % (kManglerWrap - 1)) + 1;
-}
-
-}  // namespace
-
-scoped_ptr<RoutingIDIssuer> RoutingIDIssuer::Create() {
-  if (0 < g_disablingIDManglingCount)
-    return make_scoped_ptr(new RoutingIDIssuer(0));
-
-  DCHECK(0 == g_disablingIDManglingCount);
-  return make_scoped_ptr(new RoutingIDIssuer(GetNextMangler()));
-}
-
-scoped_ptr<RoutingIDIssuer> RoutingIDIssuer::CreateWithMangler(int mangler) {
-  return make_scoped_ptr(new RoutingIDIssuer(mangler));
-}
-
-RoutingIDIssuer::RoutingIDIssuer(int mangler) : mangler_(mangler) {
-  DCHECK(0 <= mangler_ && mangler_ < kManglerWrap) << mangler_
-                                                   << ">=" << kManglerWrap;
-}
-
-int RoutingIDIssuer::IssueNext() {
-  return (mangler_ << kIDBits) | ((next_.GetNext() + 1) & kIDMask);
-}
-
-bool RoutingIDIssuer::IsProbablyValid(int issued_id) const {
-  return (mangler_ << kIDBits) == (issued_id & ~kIDMask);
-}
-
-void RoutingIDIssuer::DisableIDMangling() {
-  g_disablingIDManglingCount++;
-}
-
-void RoutingIDIssuer::EnableIDMangling() {
-  g_disablingIDManglingCount--;
-  DCHECK(0 <= g_disablingIDManglingCount);
-}
-
-}  // namespace content