Standardize usage of virtual/override/final in mojo/

mojo/edk/system/local_data_pipe.h

 // Copyright 2013 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 MOJO_EDK_SYSTEM_LOCAL_DATA_PIPE_H_
 #define MOJO_EDK_SYSTEM_LOCAL_DATA_PIPE_H_
 
 #include "base/macros.h"
 #include "base/memory/aligned_memory.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "mojo/edk/system/data_pipe.h"
 #include "mojo/edk/system/system_impl_export.h"
 
 namespace mojo {
 namespace system {
 
 // |LocalDataPipe| is a subclass that "implements" |DataPipe| for data pipes
 // whose producer and consumer are both local. This class is thread-safe (with
 // protection provided by |DataPipe|'s |lock_|.
 class MOJO_SYSTEM_IMPL_EXPORT LocalDataPipe : public DataPipe {
  public:
   // |validated_options| should be the output of |DataPipe::ValidateOptions()|.
   // In particular: |struct_size| is ignored (so |validated_options| must be the
   // current version of the struct) and |capacity_num_bytes| must be nonzero.
   explicit LocalDataPipe(const MojoCreateDataPipeOptions& validated_options);
 
  private:
   friend class base::RefCountedThreadSafe<LocalDataPipe>;
-  virtual ~LocalDataPipe();
+  ~LocalDataPipe() override;
 
   // |DataPipe| implementation:
-  virtual void ProducerCloseImplNoLock() override;
-  virtual MojoResult ProducerWriteDataImplNoLock(
+  void ProducerCloseImplNoLock() override;
+  MojoResult ProducerWriteDataImplNoLock(
       UserPointer<const void> elements,
       UserPointer<uint32_t> num_bytes,
       uint32_t max_num_bytes_to_write,
       uint32_t min_num_bytes_to_write) override;
-  virtual MojoResult ProducerBeginWriteDataImplNoLock(
+  MojoResult ProducerBeginWriteDataImplNoLock(
       UserPointer<void*> buffer,
       UserPointer<uint32_t> buffer_num_bytes,
       uint32_t min_num_bytes_to_write) override;
-  virtual MojoResult ProducerEndWriteDataImplNoLock(
+  MojoResult ProducerEndWriteDataImplNoLock(
       uint32_t num_bytes_written) override;
-  virtual HandleSignalsState ProducerGetHandleSignalsStateImplNoLock()
-      const override;
-  virtual void ConsumerCloseImplNoLock() override;
-  virtual MojoResult ConsumerReadDataImplNoLock(
+  HandleSignalsState ProducerGetHandleSignalsStateImplNoLock() const override;
+  void ConsumerCloseImplNoLock() override;
+  MojoResult ConsumerReadDataImplNoLock(
       UserPointer<void> elements,
       UserPointer<uint32_t> num_bytes,
       uint32_t max_num_bytes_to_read,
       uint32_t min_num_bytes_to_read) override;
-  virtual MojoResult ConsumerDiscardDataImplNoLock(
+  MojoResult ConsumerDiscardDataImplNoLock(
       UserPointer<uint32_t> num_bytes,
       uint32_t max_num_bytes_to_discard,
       uint32_t min_num_bytes_to_discard) override;
-  virtual MojoResult ConsumerQueryDataImplNoLock(
+  MojoResult ConsumerQueryDataImplNoLock(
       UserPointer<uint32_t> num_bytes) override;
-  virtual MojoResult ConsumerBeginReadDataImplNoLock(
+  MojoResult ConsumerBeginReadDataImplNoLock(
       UserPointer<const void*> buffer,
       UserPointer<uint32_t> buffer_num_bytes,
       uint32_t min_num_bytes_to_read) override;
-  virtual MojoResult ConsumerEndReadDataImplNoLock(
-      uint32_t num_bytes_read) override;
-  virtual HandleSignalsState ConsumerGetHandleSignalsStateImplNoLock()
-      const override;
+  MojoResult ConsumerEndReadDataImplNoLock(uint32_t num_bytes_read) override;
+  HandleSignalsState ConsumerGetHandleSignalsStateImplNoLock() const override;
 
   void EnsureBufferNoLock();
   void DestroyBufferNoLock();
 
   // Get the maximum (single) write/read size right now (in number of elements);
   // result fits in a |uint32_t|.
   size_t GetMaxNumBytesToWriteNoLock();
   size_t GetMaxNumBytesToReadNoLock();
 
   // Marks the given number of bytes as consumed/discarded. |num_bytes| must be
   // greater than |current_num_bytes_|.
   void MarkDataAsConsumedNoLock(size_t num_bytes);
 
   // The members below are protected by |DataPipe|'s |lock_|:
   scoped_ptr<char, base::AlignedFreeDeleter> buffer_;
   // Circular buffer.
   size_t start_index_;
   size_t current_num_bytes_;
 
   DISALLOW_COPY_AND_ASSIGN(LocalDataPipe);
 };
 
 }  // namespace system
 }  // namespace mojo
 
 #endif  // MOJO_EDK_SYSTEM_LOCAL_DATA_PIPE_H_