[BattOr] Make BattOr able to return firmware version.

tools/battor_agent/battor_agent.h

 // Copyright 2015 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 TOOLS_BATTOR_AGENT_BATTOR_AGENT_H_
 #define TOOLS_BATTOR_AGENT_BATTOR_AGENT_H_
 
 #include <map>
 
 #include "base/cancelable_callback.h"
@@ skipping 25 matching lines @@
                     public base::SupportsWeakPtr<BattOrAgent> {
  public:
   // The listener interface that must be implemented in order to interact with
   // the BattOrAgent.
   class Listener {
    public:
     virtual void OnStartTracingComplete(BattOrError error) = 0;
     virtual void OnStopTracingComplete(const std::string& trace,
                                        BattOrError error) = 0;
     virtual void OnRecordClockSyncMarkerComplete(BattOrError error) = 0;
+    virtual void OnGetVersionComplete(const int version, BattOrError error) = 0;
   };
 
   BattOrAgent(
       const std::string& path,
       Listener* listener,
       scoped_refptr<base::SingleThreadTaskRunner> file_thread_task_runner,
       scoped_refptr<base::SingleThreadTaskRunner> ui_thread_task_runner);
   virtual ~BattOrAgent();
 
   void StartTracing();
   void StopTracing();
   void RecordClockSyncMarker(const std::string& marker);
+  void GetVersion();
 
   // Returns whether the BattOr is able to record clock sync markers in its own
   // trace log.
   static bool SupportsExplicitClockSync() { return true; }
 
   // BattOrConnection::Listener implementation.
   void OnConnectionOpened(bool success) override;
   void OnBytesSent(bool success) override;
   void OnMessageRead(bool success,
                      BattOrMessageType type,
@@ skipping 10 matching lines @@
   // testing task runner that runs delayed tasks immediately deals poorly with
   // timeouts posted as future tasks.
   virtual void OnActionTimeout();
 
  private:
   enum class Command {
     INVALID,
     START_TRACING,
     STOP_TRACING,
     RECORD_CLOCK_SYNC_MARKER,
+    GET_VERSION,
   };
 
   enum class Action {
     INVALID,
 
     // Actions required to connect to a BattOr.
     REQUEST_CONNECTION,
 
     // Actions required for starting tracing.
     SEND_INIT,
@@ skipping 82 matching lines @@
 
   // The timeout that's run when an action times out.
   base::CancelableClosure timeout_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(BattOrAgent);
 };
 
 }  // namespace battor
 
 #endif  // TOOLS_BATTOR_AGENT_BATTOR_AGENT_H_