Remove ChromeBrowserProvider::GetFaviconForURL().

ios/chrome/browser/ui/webui/flags_ui.h

Index: ios/chrome/browser/ui/webui/flags_ui.h
diff --git a/ios/chrome/browser/ui/webui/flags_ui.h b/ios/chrome/browser/ui/webui/flags_ui.h
index e011da4357c72aaf1dba6208d30b29ce74cc1c23..3a4492ffbdaf4f8fc2dc087f60c711053eb2f043 100644
--- a/ios/chrome/browser/ui/webui/flags_ui.h
+++ b/ios/chrome/browser/ui/webui/flags_ui.h
@@ -8,11 +8,6 @@
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "ios/web/public/webui/web_ui_ios_controller.h"
-#include "ui/base/layout.h"
-
-namespace base {
-class RefCountedMemory;
-}
 
 class BaseFlagsUI : public web::WebUIIOSController {
  public:
@@ -24,9 +19,6 @@ class BaseFlagsUI : public web::WebUIIOSController {
   BaseFlagsUI(web::WebUIIOS* web_ui, FlagsUIKind flags_ui_kind);
   ~BaseFlagsUI() override;
 
-  static base::RefCountedMemory* GetFaviconResourceBytes(
-      ui::ScaleFactor scale_factor);
-
  private:
   void Initialize(web::WebUIIOS* web_ui, FlagsUIKind flags_ui_kind);