Create hook for autofill heuristics test files.

These files will be pulled in to run heuristic classification regression
tests for autofill.

Bug: 1474308
Change-Id: I6ab943a8129e83aafb568405540c5d82cc722eed
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4810518
Reviewed-by: Dominic Battre <battre@chromium.org>
Auto-Submit: Ian Struiksma <ianstruiksma@google.com>
Commit-Queue: Dominic Battre <battre@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1187909}

.gitignore

@@ -223,6 +223,7 @@ vs-chromium-project.txt
 /components/resources/default_300_percent/google_chrome
 /components/search_engines/prepopulated_engines.xml
 /components/site_isolation/internal
+/components/test/data/autofill/heuristics-json/internal
 /components/suggestions.xml
 /components/variations.xml
 /components/vector_icons/google_chrome/

DEPS

@@ -4218,6 +4218,12 @@ deps = {
       'condition': 'checkout_src_internal',
   },
 
+  'src/components/test/data/autofill/heuristics-json/internal': {
+      'url': Var('chrome_git') + '/chrome/test/autofill/structured_forms.git' + '@' +
+        'fc9323141d970c474cb466c32c9be6cfcf20e549',
+      'condition': 'checkout_chromium_autofill_test_dependencies',
+  },
+
   'src/components/vector_icons/google_chrome': {
       'url': Var('chrome_git') + '/chrome/vector_icons/google_chrome.git' + '@' +
         'dbf059ca9ed5a4da6ae628042a2797e822a53d79',