Removing file_thread_task_runner parameter from SerialIoHandler

tools/battor_agent/battor_agent_unittest.cc

 // 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.
 
 #include <memory>
 
 #include "tools/battor_agent/battor_agent.h"
 
 #include "base/test/test_simple_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ skipping 64 matching lines @@
  private:
   DISALLOW_COPY_AND_ASSIGN(MockBattOrConnection);
 };
 
 }  // namespace
 
 // TestableBattOrAgent uses a fake BattOrConnection to be testable.
 class TestableBattOrAgent : public BattOrAgent {
  public:
   TestableBattOrAgent(BattOrAgent::Listener* listener)
-      : BattOrAgent("/dev/test", listener, nullptr, nullptr) {
+      : BattOrAgent("/dev/test", listener, nullptr) {
     connection_ =
         std::unique_ptr<BattOrConnection>(new MockBattOrConnection(this));
   }
 
   MockBattOrConnection* GetConnection() {
     return static_cast<MockBattOrConnection*>(connection_.get());
   }
 
   void OnActionTimeout() override {}
 };
@@ skipping 983 matching lines @@
                 ToCharVector(kStartTracingAck));
 
   EXPECT_FALSE(IsCommandComplete());
 
   RunGetFirmwareGitHashTo(BattOrAgentState::READ_GIT_HASH_RECEIVED);
 
   EXPECT_TRUE(IsCommandComplete());
   EXPECT_EQ(BATTOR_ERROR_NONE, GetCommandError());
 }
 }  // namespace battor