Revert of Use ChromeBrowserStateManager instead of BrowserListIOS.

ios/chrome/browser/metrics/new_tab_page_uma.mm

Index: ios/chrome/browser/metrics/new_tab_page_uma.mm
diff --git a/ios/chrome/browser/metrics/new_tab_page_uma.mm b/ios/chrome/browser/metrics/new_tab_page_uma.mm
index 47375cc400630be8bc499781469c76b9592903f8..48fe6dbbbf90d6a5303d674b76700ad72d0c6d9e 100644
--- a/ios/chrome/browser/metrics/new_tab_page_uma.mm
+++ b/ios/chrome/browser/metrics/new_tab_page_uma.mm
@@ -10,15 +10,16 @@
 #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/tabs/tab_model_list.h"
+#import "ios/chrome/browser/ui/browser_list_ios.h"
 #include "url/gurl.h"
 
 namespace new_tab_page_uma {
 
 bool IsCurrentlyOnNTP(ios::ChromeBrowserState* browserState) {
-  TabModel* tabModel = GetLastActiveTabModelForChromeBrowserState(browserState);
-  return tabModel.currentTab &&
-         tabModel.currentTab.url == GURL(kChromeUINewTabURL);
+  Tab* currentTab =
+      [[BrowserListIOS::GetLastActiveWithBrowserState(browserState) tabModel]
+          currentTab];
+  return currentTab && currentTab.url == GURL(kChromeUINewTabURL);
 }
 
 void RecordAction(ios::ChromeBrowserState* browserState, ActionType type) {