[Chrome OS] Clean up BrowserTabStripTracker Init parameter.

chrome/browser/metrics/tab_reactivation_tracker.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/metrics/tab_reactivation_tracker.h"
 
 #include "base/memory/ptr_util.h"
 #include "base/stl_util.h"
 #include "content/public/browser/web_contents_observer.h"
 
@@ skipping 53 matching lines @@
   if (!is_closing_)
     tab_reactivation_tracker_->NotifyTabDeactivating(web_contents());
 }
 
 void TabReactivationTracker::WebContentsHelper::OnTabClosing() {
   is_closing_ = true;
 }
 
 TabReactivationTracker::TabReactivationTracker(Delegate* delegate)
     : delegate_(delegate), browser_tab_strip_tracker_(this, nullptr, nullptr) {
-  browser_tab_strip_tracker_.Init(
-      BrowserTabStripTracker::InitWith::ALL_BROWERS);
+  browser_tab_strip_tracker_.Init();
 }
 
 TabReactivationTracker::~TabReactivationTracker() = default;
 
 void TabReactivationTracker::TabInsertedAt(TabStripModel* tab_strip_model,
                                            content::WebContents* contents,
                                            int index,
                                            bool foreground) {}
 
 void TabReactivationTracker::TabClosingAt(TabStripModel* tab_strip_model,
@@ skipping 32 matching lines @@
 
   return helper_map_[contents].get();
 }
 
 void TabReactivationTracker::OnWebContentsDestroyed(
     content::WebContents* contents) {
   helper_map_.erase(contents);
 }
 
 }  // namespace metrics