[BattOr] Reduce StartTracing time by about four seconds.

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 93 matching lines @@
     READ_SET_GAIN_ACK,
     SEND_START_TRACING,
     READ_START_TRACING_ACK,
 
     // Actions required for stopping tracing.
     SEND_EEPROM_REQUEST,
     READ_EEPROM,
     SEND_SAMPLES_REQUEST,
     READ_CALIBRATION_FRAME,
     READ_DATA_FRAME,
+    RESET,
 
     // Actions required for recording a clock sync marker.
     SEND_CURRENT_SAMPLE_REQUEST,
     READ_CURRENT_SAMPLE,
 
     // Actions required for returning firmware git hash.
     SEND_GIT_HASH_REQUEST,
     READ_GIT_HASH,
   };
 
@@ skipping 70 matching lines @@
 
   // The git hash of the BattOr firmware.
   std::string firmware_git_hash_;
 
   DISALLOW_COPY_AND_ASSIGN(BattOrAgent);
 };
 
 }  // namespace battor
 
 #endif  // TOOLS_BATTOR_AGENT_BATTOR_AGENT_H_