Get rid of url_request_tracking.*. The only other place that used it other than ResourceDispatch...

chrome/browser/net/url_request_tracking.cc

-// Copyright (c) 2009 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 "chrome/browser/net/url_request_tracking.h"
-
-#include "base/basictypes.h"
-#include "net/url_request/url_request.h"
-
-namespace {
-
-// The value is not important, this address is used as the unique key for the
-// PID.
-const void* kOriginPidKey = 0;
-
-class OriginPidData : public net::URLRequest::UserData {
- public:
-  explicit OriginPidData(int pid) : pid_(pid) {}
-  virtual ~OriginPidData() {}
-
-  int pid() const { return pid_; }
-  void set_pid(int pid) { pid_ = pid; }
-
- private:
-  int pid_;
-
-  DISALLOW_COPY_AND_ASSIGN(OriginPidData);
-};
-
-}  // namespace
-
-namespace chrome_browser_net {
-
-void SetOriginPIDForRequest(int pid, net::URLRequest* request) {
-  // The request will take ownership.
-  request->SetUserData(&kOriginPidKey, new OriginPidData(pid));
-}
-
-int GetOriginPIDForRequest(const net::URLRequest* request) {
-  const OriginPidData* data = static_cast<const OriginPidData*>(
-      request->GetUserData(&kOriginPidKey));
-  if (!data)
-    return 0;
-  return data->pid();
-}
-
-}  // namespace chrome_browser_net