Add metrics to keep track of the tab activate/deactivate cycle

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);
 }
 
 DevToolsAutoOpener::~DevToolsAutoOpener() {
 }
 
-void DevToolsAutoOpener::TabInsertedAt(
-    content::WebContents* contents,
-    int index,
-    bool foreground) {
+void DevToolsAutoOpener::TabInsertedAt(TabStripModel* tab_strip_model,
+                                       content::WebContents* contents,
+                                       int index,
+                                       bool foreground) {
   if (!DevToolsWindow::IsDevToolsWindow(contents))
     DevToolsWindow::OpenDevToolsWindow(contents);
 }