Have AutofillManagerDelegate supply the AutofillWebDataService to core code.

android_webview/native/aw_autofill_manager_delegate.cc

Index: android_webview/native/aw_autofill_manager_delegate.cc
diff --git a/android_webview/native/aw_autofill_manager_delegate.cc b/android_webview/native/aw_autofill_manager_delegate.cc
index c05666111871c96a1b45d963987d43fbe6c5144d..ef8ab291c64ae91f8c4ba94c642059f6fa2a6888 100644
--- a/android_webview/native/aw_autofill_manager_delegate.cc
+++ b/android_webview/native/aw_autofill_manager_delegate.cc
@@ -70,6 +70,11 @@ AwAutofillManagerDelegate::GetPersonalDataManager() {
   return NULL;
 }
 
+scoped_refptr<autofill::AutofillWebDataService> GetAutofillWebDataService() {
+  return autofill::AutofillWebDataService::FromBrowserContext(
+      web_contents_->GetBrowserContext());
+}
+
 void AwAutofillManagerDelegate::ShowAutofillPopup(
     const gfx::RectF& element_bounds,
     base::i18n::TextDirection text_direction,