Standardize usage of virtual/override/final in net/

net/disk_cache/simple/simple_entry_impl.h

Index: net/disk_cache/simple/simple_entry_impl.h
diff --git a/net/disk_cache/simple/simple_entry_impl.h b/net/disk_cache/simple/simple_entry_impl.h
index 7c11b9660d0e263b6d865efcca3088a7a2f36d97..ebc6bf15e19e6b08efd34e25aa1b596ca300cb7c 100644
--- a/net/disk_cache/simple/simple_entry_impl.h
+++ b/net/disk_cache/simple/simple_entry_impl.h
@@ -80,38 +80,38 @@ class NET_EXPORT_PRIVATE SimpleEntryImpl : public Entry,
   void SetKey(const std::string& key);
 
   // From Entry:
-  virtual void Doom() override;
-  virtual void Close() override;
-  virtual std::string GetKey() const override;
-  virtual base::Time GetLastUsed() const override;
-  virtual base::Time GetLastModified() const override;
-  virtual int32 GetDataSize(int index) const override;
-  virtual int ReadData(int stream_index,
-                       int offset,
-                       net::IOBuffer* buf,
-                       int buf_len,
-                       const CompletionCallback& callback) override;
-  virtual int WriteData(int stream_index,
-                        int offset,
-                        net::IOBuffer* buf,
-                        int buf_len,
-                        const CompletionCallback& callback,
-                        bool truncate) override;
-  virtual int ReadSparseData(int64 offset,
-                             net::IOBuffer* buf,
-                             int buf_len,
-                             const CompletionCallback& callback) override;
-  virtual int WriteSparseData(int64 offset,
-                              net::IOBuffer* buf,
-                              int buf_len,
-                              const CompletionCallback& callback) override;
-  virtual int GetAvailableRange(int64 offset,
-                                int len,
-                                int64* start,
-                                const CompletionCallback& callback) override;
-  virtual bool CouldBeSparse() const override;
-  virtual void CancelSparseIO() override;
-  virtual int ReadyForSparseIO(const CompletionCallback& callback) override;
+  void Doom() override;
+  void Close() override;
+  std::string GetKey() const override;
+  base::Time GetLastUsed() const override;
+  base::Time GetLastModified() const override;
+  int32 GetDataSize(int index) const override;
+  int ReadData(int stream_index,
+               int offset,
+               net::IOBuffer* buf,
+               int buf_len,
+               const CompletionCallback& callback) override;
+  int WriteData(int stream_index,
+                int offset,
+                net::IOBuffer* buf,
+                int buf_len,
+                const CompletionCallback& callback,
+                bool truncate) override;
+  int ReadSparseData(int64 offset,
+                     net::IOBuffer* buf,
+                     int buf_len,
+                     const CompletionCallback& callback) override;
+  int WriteSparseData(int64 offset,
+                      net::IOBuffer* buf,
+                      int buf_len,
+                      const CompletionCallback& callback) override;
+  int GetAvailableRange(int64 offset,
+                        int len,
+                        int64* start,
+                        const CompletionCallback& callback) override;
+  bool CouldBeSparse() const override;
+  void CancelSparseIO() override;
+  int ReadyForSparseIO(const CompletionCallback& callback) override;
 
  private:
   class ScopedOperationRunner;
@@ -144,7 +144,7 @@ class NET_EXPORT_PRIVATE SimpleEntryImpl : public Entry,
     CRC_CHECK_MAX = 4,
   };
 
-  virtual ~SimpleEntryImpl();
+  ~SimpleEntryImpl() override;
 
   // Must be used to invoke a client-provided completion callback for an
   // operation initiated through the backend (e.g. create, open) so that clients