[Chrome OS] Clean up BrowserTabStripTracker Init parameter.

chrome/browser/devtools/devtools_auto_opener.cc

 // Copyright 2016 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/browser/devtools/devtools_auto_opener.h"
 
 #include "base/command_line.h"
 #include "chrome/browser/devtools/devtools_window.h"
 
 DevToolsAutoOpener::DevToolsAutoOpener()
     : browser_tab_strip_tracker_(this, nullptr, nullptr) {
-  browser_tab_strip_tracker_.Init(
-      BrowserTabStripTracker::InitWith::ALL_BROWERS);
+  browser_tab_strip_tracker_.Init();
 }
 
 DevToolsAutoOpener::~DevToolsAutoOpener() {
 }
 
 void DevToolsAutoOpener::TabInsertedAt(TabStripModel* tab_strip_model,
                                        content::WebContents* contents,
                                        int index,
                                        bool foreground) {
   if (!DevToolsWindow::IsDevToolsWindow(contents))
     DevToolsWindow::OpenDevToolsWindow(contents);
 }