Remove unused linked_ptr inclusion

chrome/test/base/chrome_test_launcher.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 "chrome/test/base/chrome_test_launcher.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/debug/leak_annotations.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/logging.h"
 #include "base/macros.h"
-#include "base/memory/linked_ptr.h"
 #include "base/memory/ptr_util.h"
 #include "base/process/process_metrics.h"
 #include "base/run_loop.h"
 #include "base/strings/string_util.h"
 #include "base/test/test_file_util.h"
 #include "build/build_config.h"
 #include "chrome/app/chrome_main_delegate.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/install_static/install_details.h"
@@ skipping 95 matching lines @@
 #if defined(OS_LINUX) || defined(OS_ANDROID) || defined(OS_WIN)
   // We leak this pointer intentionally. The crash client needs to outlive
   // all other code.
   ChromeCrashReporterClient* crash_client = new ChromeCrashReporterClient();
   ANNOTATE_LEAKING_OBJECT_PTR(crash_client);
   crash_reporter::SetCrashReporterClient(crash_client);
 #endif
 
   return content::LaunchTests(delegate, default_jobs, argc, argv);
 }