Use ChromeBrowserStateManager instead of BrowserListIOS.

ios/chrome/browser/ui/browser_list_ios.mm

-// Copyright 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.
-
-#import "ios/chrome/browser/ui/browser_list_ios.h"
-
-#include "ios/chrome/browser/browser_state/chrome_browser_state.h"
-#include "ios/chrome/browser/tabs/tab_model.h"
-
-BrowserListIOS::BrowserVector* BrowserListIOS::browsers_;
-
-void BrowserListIOS::AddBrowser(id<BrowserIOS> browser) {
-  EnsureBrowsersIsValid();
-  DCHECK(browser);
-  browsers_->push_back(browser);
-}
-
-void BrowserListIOS::RemoveBrowser(id<BrowserIOS> browser) {
-  if (!browsers_)
-    return;
-  DCHECK(browser);
-  const iterator remove_browser =
-      std::find(browsers_->begin(), browsers_->end(), browser);
-  if (remove_browser != browsers_->end())
-    browsers_->erase(remove_browser);
-}
-
-id<BrowserIOS> BrowserListIOS::GetLastActiveWithBrowserState(
-    ios::ChromeBrowserState* browser_state) {
-  DCHECK(browser_state);
-  for (const_iterator i = BrowserListIOS::begin(); i != BrowserListIOS::end();
-       ++i) {
-    if ([*i browserState] == browser_state)
-      return *i;
-  }
-  return NULL;
-}
-
-BrowserListIOS::const_iterator BrowserListIOS::begin() {
-  EnsureBrowsersIsValid();
-  return browsers_->begin();
-}
-
-BrowserListIOS::const_iterator BrowserListIOS::end() {
-  EnsureBrowsersIsValid();
-  return browsers_->end();
-}
-
-// static
-bool BrowserListIOS::IsOffTheRecordSessionActive() {
-  for (const_iterator i = BrowserListIOS::begin(); i != BrowserListIOS::end();
-       ++i) {
-    // Unlike desktop, an Incognito browser can exist but be empty, so filter
-    // that case out.
-    if ([*i browserState] && [*i browserState]->IsOffTheRecord() &&
-        ![[*i tabModel] isEmpty])
-      return true;
-  }
-  return false;
-}
-
-void BrowserListIOS::EnsureBrowsersIsValid() {
-  if (browsers_)
-    return;
-  browsers_ = new BrowserVector;
-}