Removing file_thread_task_runner parameter from SerialIoHandler

content/browser/tracing/power_tracing_agent.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 "base/bind.h"
 #include "base/lazy_instance.h"
 #include "base/memory/singleton.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/trace_event/trace_event_impl.h"
 #include "content/browser/tracing/power_tracing_agent.h"
@@ skipping 51 matching lines @@
       base::Bind(&PowerTracingAgent::StartAgentTracingOnIOThread,
                  base::Unretained(this), path, callback));
 }
 
 void PowerTracingAgent::StartAgentTracingOnIOThread(
     const std::string& path,
     const StartAgentTracingCallback& callback) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   battor_agent_.reset(new battor::BattOrAgent(
-      path, this, BrowserThread::GetTaskRunnerForThread(BrowserThread::FILE),
-      BrowserThread::GetTaskRunnerForThread(BrowserThread::UI)));
+      path, this, BrowserThread::GetTaskRunnerForThread(BrowserThread::UI)));
 
   start_tracing_callback_ = callback;
   battor_agent_->StartTracing();
 }
 
 void PowerTracingAgent::OnStartTracingComplete(battor::BattOrError error) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   bool success = (error == battor::BATTOR_ERROR_NONE);
   if (!success)
@@ skipping 96 matching lines @@
 bool PowerTracingAgent::SupportsExplicitClockSync() {
   return battor_agent_->SupportsExplicitClockSync();
 }
 
 void PowerTracingAgent::OnGetFirmwareGitHashComplete(
     const std::string& version, battor::BattOrError error) {
   return;
 }
 
 }  // namespace content