[Sync] Fix flaky TwoClientAutofillSyncTest.ConflictingFields.

chrome/browser/sync/test/integration/autofill_helper.h

Index: chrome/browser/sync/test/integration/autofill_helper.h
diff --git a/chrome/browser/sync/test/integration/autofill_helper.h b/chrome/browser/sync/test/integration/autofill_helper.h
index 7cffe6e18578b0429cb6bbfeb82e697b0db32856..a4895dfca4c43e2db1e7381d54f7ed617dd3f8b5 100644
--- a/chrome/browser/sync/test/integration/autofill_helper.h
+++ b/chrome/browser/sync/test/integration/autofill_helper.h
@@ -100,10 +100,6 @@ int GetKeyCount(int profile);
 // |profile_a| and |profile_b|. Returns true if they match.
 bool ProfilesMatch(int profile_a, int profile_b) WARN_UNUSED_RESULT;
 
-// Compares the autofill profiles for all sync profiles, and returns true if
-// they all match.
-bool AllProfilesMatch() WARN_UNUSED_RESULT;
-
 // Creates a test autofill profile based on the persona specified in |type|.
 autofill::AutofillProfile CreateAutofillProfile(ProfileType type);