Remove ChromeBrowserProvider::CreateInfoBarView() method.

ios/chrome/browser/downstream_chromium_browser_provider.mm

Index: ios/chrome/browser/downstream_chromium_browser_provider.mm
diff --git a/ios/chrome/browser/downstream_chromium_browser_provider.mm b/ios/chrome/browser/downstream_chromium_browser_provider.mm
index de3c9f4cb93f10cce26287b03b5ca9a6c52133c0..2e4b3aa59e5ef60b87f5cdac8da2cdecb816f4fe 100644
--- a/ios/chrome/browser/downstream_chromium_browser_provider.mm
+++ b/ios/chrome/browser/downstream_chromium_browser_provider.mm
@@ -17,7 +17,6 @@
 #import "ios/chrome/browser/ui/bookmarks/bookmark_interaction_controller.h"
 #import "ios/chrome/browser/ui/bookmarks/bookmark_promo_controller.h"
 #import "ios/chrome/browser/ui/browser_list_ios.h"
-#import "ios/chrome/browser/ui/infobars/infobar_view.h"
 #include "ios/chrome/browser/ui/webui/chrome_web_ui_ios_controller_factory.h"
 #import "ios/chrome/common/material_timing.h"
 
@@ -35,12 +34,6 @@ void DownstreamChromiumBrowserProvider::RegisterProfilePrefs(
   [HandoffManager registerBrowserStatePrefs:registry];
 }
 
-InfoBarViewPlaceholder DownstreamChromiumBrowserProvider::CreateInfoBarView(
-    CGRect frame,
-    InfoBarViewDelegate* delegate) NS_RETURNS_RETAINED {
-  return [[InfoBarView alloc] initWithFrame:frame delegate:delegate];
-}
-
 ios::LiveTabContextProvider*
 DownstreamChromiumBrowserProvider::GetLiveTabContextProvider() {
   return tab_restore_service_delegate_provider_.get();