Remove unused line.

content/app/content_main_runner.cc

 // Copyright (c) 2012 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 "content/public/app/content_main_runner.h"
 
 #include <stddef.h>
 #include <stdlib.h>
 #include <string.h>
 
@@ skipping 119 matching lines @@
 
 namespace {
 
 // This sets up two singletons responsible for managing field trials. The
 // |field_trial_list| singleton lives on the stack and must outlive the Run()
 // method of the process.
 void InitializeFieldTrialAndFeatureList(
     std::unique_ptr<base::FieldTrialList>* field_trial_list) {
   const base::CommandLine& command_line =
       *base::CommandLine::ForCurrentProcess();
-  std::string process_type =
-      command_line.GetSwitchValueASCII(switches::kProcessType);
 
   // Initialize statistical testing infrastructure.  We set the entropy
   // provider to nullptr to disallow non-browser processes from creating
   // their own one-time randomized trials; they should be created in the
   // browser process.
   field_trial_list->reset(new base::FieldTrialList(nullptr));
 
   // Ensure any field trials in browser are reflected into the child
   // process.
   if (command_line.HasSwitch(switches::kForceFieldTrials)) {
@@ skipping 694 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(ContentMainRunnerImpl);
 };
 
 // static
 ContentMainRunner* ContentMainRunner::Create() {
   return new ContentMainRunnerImpl();
 }
 
 }  // namespace content