Reporting: Remove persistence for now.

net/reporting/reporting_persister.h

 // Copyright 2017 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 NET_REPORTING_REPORTING_PERSISTER_H_
 #define NET_REPORTING_REPORTING_PERSISTER_H_
 
 #include <memory>
 
 #include "net/base/net_export.h"
 
-namespace base {
-class Timer;
-}  // namespace base
-
 namespace net {
 
 class ReportingContext;
 
-// Periodically persists the state of the Reporting system to (reasonably)
-// stable storage using the methods provided by the ReportingDelegate.
+// Will persist the state of the Reporting system to (reasonably) stable
+// storage using an as-yet-unwritten persistence mechanism within //net.
 class NET_EXPORT ReportingPersister {
  public:
   // Creates a ReportingPersister. |context| must outlive the persister.
   static std::unique_ptr<ReportingPersister> Create(ReportingContext* context);
 
   virtual ~ReportingPersister();
-
-  // Initializes the Persister, which deserializes any previously-persisted data
-  // that is available through the Context's Delegate.
-  virtual void Initialize() = 0;
-
-  // Replaces the internal Timer used for scheduling writes to stable storage
-  // with a caller-specified one so that unittests can provide a MockTimer.
-  virtual void SetTimerForTesting(std::unique_ptr<base::Timer> timer) = 0;
 };
 
 }  // namespace net
 
 #endif  // NET_REPORTING_REPORTING_PERSISTER_H_