Fix {virtual,override,final} build failures on official CrOS build.

rlz/chromeos/lib/rlz_value_store_chromeos.h

 // 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.
 
 #ifndef RLZ_CHROMEOS_LIB_RLZ_VALUE_STORE_CHROMEOS_H_
 #define RLZ_CHROMEOS_LIB_RLZ_VALUE_STORE_CHROMEOS_H_
 
 #include "base/files/file_path.h"
 #include "base/threading/non_thread_safe.h"
 #include "base/values.h"
@@ skipping 10 matching lines @@
 // An implementation of RlzValueStore for ChromeOS.
 class RlzValueStoreChromeOS : public RlzValueStore,
                               public base::NonThreadSafe {
  public:
   // // Sets the task runner that will be used by ImportantFileWriter for write
   // // operations.
   // static void SetFileTaskRunner(base::SequencedTaskRunner* file_task_runner);
 
   // Creates new instance and synchronously reads data from file.
   RlzValueStoreChromeOS(const base::FilePath& store_path);
-  virtual ~RlzValueStoreChromeOS();
+  ~RlzValueStoreChromeOS() override;
 
   // RlzValueStore overrides:
-  virtual bool HasAccess(AccessType type) override;
+  bool HasAccess(AccessType type) override;
 
-  virtual bool WritePingTime(Product product, int64 time) override;
-  virtual bool ReadPingTime(Product product, int64* time) override;
-  virtual bool ClearPingTime(Product product) override;
+  bool WritePingTime(Product product, int64 time) override;
+  bool ReadPingTime(Product product, int64* time) override;
+  bool ClearPingTime(Product product) override;
 
-  virtual bool WriteAccessPointRlz(AccessPoint access_point,
-                                   const char* new_rlz) override;
-  virtual bool ReadAccessPointRlz(AccessPoint access_point,
-                                  char* rlz,
-                                  size_t rlz_size) override;
-  virtual bool ClearAccessPointRlz(AccessPoint access_point) override;
+  bool WriteAccessPointRlz(AccessPoint access_point,
+                           const char* new_rlz) override;
+  bool ReadAccessPointRlz(AccessPoint access_point,
+                          char* rlz,
+                          size_t rlz_size) override;
+  bool ClearAccessPointRlz(AccessPoint access_point) override;
 
-  virtual bool AddProductEvent(Product product, const char* event_rlz) override;
-  virtual bool ReadProductEvents(Product product,
-                                 std::vector<std::string>* events) override;
-  virtual bool ClearProductEvent(Product product,
-                                 const char* event_rlz) override;
-  virtual bool ClearAllProductEvents(Product product) override;
+  bool AddProductEvent(Product product, const char* event_rlz) override;
+  bool ReadProductEvents(Product product,
+                         std::vector<std::string>* events) override;
+  bool ClearProductEvent(Product product, const char* event_rlz) override;
+  bool ClearAllProductEvents(Product product) override;
 
-  virtual bool AddStatefulEvent(Product product,
-                                const char* event_rlz) override;
-  virtual bool IsStatefulEvent(Product product,
-                               const char* event_rlz) override;
-  virtual bool ClearAllStatefulEvents(Product product) override;
+  bool AddStatefulEvent(Product product, const char* event_rlz) override;
+  bool IsStatefulEvent(Product product, const char* event_rlz) override;
+  bool ClearAllStatefulEvents(Product product) override;
 
-  virtual void CollectGarbage() override;
+  void CollectGarbage() override;
 
  private:
   // Reads RLZ store from file.
   void ReadStore();
 
   // Writes RLZ store back to file.
   void WriteStore();
 
   // Adds |value| to list at |list_name| path in JSON store.
   bool AddValueToList(std::string list_name, base::Value* value);
   // Removes |value| from list at |list_name| path in JSON store.
   bool RemoveValueFromList(std::string list_name, const base::Value& value);
 
   // In-memory store with RLZ data.
   scoped_ptr<base::DictionaryValue> rlz_store_;
 
   base::FilePath store_path_;
 
   bool read_only_;
 
   DISALLOW_COPY_AND_ASSIGN(RlzValueStoreChromeOS);
 };
 
 }  // namespace rlz_lib
 
 #endif  // RLZ_CHROMEOS_LIB_RLZ_VALUE_STORE_CHROMEOS_H_