[fixup] Adapt autofill component for WebEngine

Fix build race condition due to missing dep, dells with:

In file included from ... autofill/core/browser/autofill_field.h:21,
                 from ... autofill/core/browser/autofill_type.cc:11:
... autofill/core/browser/form_parsing/regex_patterns.h:14:10:
fatal error: components/autofill/core/browser/form_parsing/buildflags.h: No such file or directory

Change-Id: I6fc657542891aeaaf12f940381c251aba0273d5d
Reviewed-on: https://codereview.qt-project.org/c/qt/qtwebengine-chromium/+/600653
Reviewed-by: Peter Varga <[email protected]>
Reviewed-by: Allan Sandfeld Jensen <[email protected]>

Author: Michal Klocek

chromium/components/autofill/core/browser/BUILD.gn

@@ -874,6 +874,7 @@ jumbo_static_library("browser") {
 
     deps = []
     deps = [
+      ":buildflags",
       "//base",
       "//base:i18n",
       "//build:branding_buildflags",