Regkey functions return error code instead of bool

chrome_frame/ready_mode/internal/registry_ready_mode_state.h

 // Copyright (c) 2010 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 CHROME_FRAME_READY_MODE_INTERNAL_REGISTRY_READY_MODE_STATE_H_
 #define CHROME_FRAME_READY_MODE_INTERNAL_REGISTRY_READY_MODE_STATE_H_
 #pragma once
 
 #include <string>
 
@@ skipping 43 matching lines @@
   virtual void AcceptChromeFrame();
 
  protected:
   // allow dependency replacement via derivation for tests
   virtual base::Time GetNow();
 
  private:
   // Retrieves state from the registry. Returns true upon success.
   bool GetValue(int64* value, bool* exists);
   // Stores value in the registry. Returns true upon success.
-  bool StoreValue(int64 value);
+  bool StoreValue(const int64& value);
 
   base::TimeDelta temporary_decline_duration_;
   int temporary_decline_length_seconds_;
   std::wstring key_name_;
   scoped_ptr<InstallationState> installation_state_;
   scoped_ptr<Observer> observer_;
 };  // class RegistryReadyModeState
 
 #endif  // CHROME_FRAME_READY_MODE_INTERNAL_REGISTRY_READY_MODE_STATE_H_