Standardize usage of virtual/override/final in mojo/

mojo/edk/system/local_message_pipe_endpoint.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_MESSAGE_PIPE_ENDPOINT_H_
 #define MOJO_EDK_SYSTEM_LOCAL_MESSAGE_PIPE_ENDPOINT_H_
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "mojo/edk/system/handle_signals_state.h"
 #include "mojo/edk/system/message_in_transit_queue.h"
 #include "mojo/edk/system/message_pipe_endpoint.h"
 #include "mojo/edk/system/system_impl_export.h"
 #include "mojo/edk/system/waiter_list.h"
 
 namespace mojo {
 namespace system {
 
 class MOJO_SYSTEM_IMPL_EXPORT LocalMessagePipeEndpoint
     : public MessagePipeEndpoint {
  public:
   LocalMessagePipeEndpoint();
-  virtual ~LocalMessagePipeEndpoint();
+  ~LocalMessagePipeEndpoint() override;
 
   // |MessagePipeEndpoint| implementation:
-  virtual Type GetType() const override;
-  virtual bool OnPeerClose() override;
-  virtual void EnqueueMessage(scoped_ptr<MessageInTransit> message) override;
+  Type GetType() const override;
+  bool OnPeerClose() override;
+  void EnqueueMessage(scoped_ptr<MessageInTransit> message) override;
 
   // There's a dispatcher for |LocalMessagePipeEndpoint|s, so we have to
   // implement/override these:
-  virtual void Close() override;
-  virtual void CancelAllWaiters() override;
-  virtual MojoResult ReadMessage(UserPointer<void> bytes,
-                                 UserPointer<uint32_t> num_bytes,
-                                 DispatcherVector* dispatchers,
-                                 uint32_t* num_dispatchers,
-                                 MojoReadMessageFlags flags) override;
-  virtual HandleSignalsState GetHandleSignalsState() const override;
-  virtual MojoResult AddWaiter(Waiter* waiter,
-                               MojoHandleSignals signals,
-                               uint32_t context,
-                               HandleSignalsState* signals_state) override;
-  virtual void RemoveWaiter(Waiter* waiter,
-                            HandleSignalsState* signals_state) override;
+  void Close() override;
+  void CancelAllWaiters() override;
+  MojoResult ReadMessage(UserPointer<void> bytes,
+                         UserPointer<uint32_t> num_bytes,
+                         DispatcherVector* dispatchers,
+                         uint32_t* num_dispatchers,
+                         MojoReadMessageFlags flags) override;
+  HandleSignalsState GetHandleSignalsState() const override;
+  MojoResult AddWaiter(Waiter* waiter,
+                       MojoHandleSignals signals,
+                       uint32_t context,
+                       HandleSignalsState* signals_state) override;
+  void RemoveWaiter(Waiter* waiter, HandleSignalsState* signals_state) override;
 
   // This is only to be used by |MessagePipe|:
   MessageInTransitQueue* message_queue() { return &message_queue_; }
 
  private:
   bool is_open_;
   bool is_peer_open_;
 
   // Queue of incoming messages.
   MessageInTransitQueue message_queue_;
   WaiterList waiter_list_;
 
   DISALLOW_COPY_AND_ASSIGN(LocalMessagePipeEndpoint);
 };
 
 }  // namespace system
 }  // namespace mojo
 
 #endif  // MOJO_EDK_SYSTEM_LOCAL_MESSAGE_PIPE_ENDPOINT_H_