Use ChromeBrowserStateManager instead of BrowserListIOS.

ios/chrome/browser/metrics/new_tab_page_uma.mm

 // 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.
 
 #import "ios/chrome/browser/metrics/new_tab_page_uma.h"
 
 #include "base/metrics/histogram.h"
 #include "components/google/core/browser/google_util.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
 #include "ios/chrome/browser/chrome_url_constants.h"
 #import "ios/chrome/browser/tabs/tab.h"
 #import "ios/chrome/browser/tabs/tab_model.h"
-#import "ios/chrome/browser/ui/browser_list_ios.h"
+#import "ios/chrome/browser/tabs/tab_model_list.h"
 #include "url/gurl.h"
 
 namespace new_tab_page_uma {
 
 bool IsCurrentlyOnNTP(ios::ChromeBrowserState* browserState) {
-  Tab* currentTab =
-      [[BrowserListIOS::GetLastActiveWithBrowserState(browserState) tabModel]
-          currentTab];
-  return currentTab && currentTab.url == GURL(kChromeUINewTabURL);
+  TabModel* tabModel = GetLastActiveTabModelForChromeBrowserState(browserState);
+  return tabModel.currentTab &&
+         tabModel.currentTab.url == GURL(kChromeUINewTabURL);
 }
 
 void RecordAction(ios::ChromeBrowserState* browserState, ActionType type) {
   DCHECK(browserState);
   if (!IsCurrentlyOnNTP(browserState) || browserState->IsOffTheRecord())
     return;
   base::HistogramBase* counter = base::Histogram::FactoryGet(
       "NewTabPage.ActioniOS", 0, NUM_ACTION_TYPES, NUM_ACTION_TYPES + 1,
       base::HistogramBase::kUmaTargetedHistogramFlag);
   counter->Add(type);
 }
 
 void RecordActionFromOmnibox(ios::ChromeBrowserState* browserState,
                              const GURL& url,
                              ui::PageTransition transition) {
   ui::PageTransition coreTransition = static_cast<ui::PageTransition>(
       transition & ui::PAGE_TRANSITION_CORE_MASK);
   if (PageTransitionCoreTypeIs(coreTransition, ui::PAGE_TRANSITION_GENERATED)) {
     RecordAction(browserState, ACTION_SEARCHED_USING_OMNIBOX);
   } else {
     if (google_util::IsGoogleHomePageUrl(GURL(url))) {
       RecordAction(browserState, ACTION_NAVIGATED_TO_GOOGLE_HOMEPAGE);
     } else {
       RecordAction(browserState, ACTION_NAVIGATED_USING_OMNIBOX);
     }
   }
 }
 }