Build Autofill component on iOS.

This change builds the core code of //component/autofill as well as its core
unittests on iOS. The iOS driver of the Autofill component will be landed at a
later date.

BUG=302428,303079
TBR=joi@chromium.org

Review URL: https://codereview.chromium.org/108013004

git-svn-id: http://src.chromium.org/svn/trunk/src/build@240504 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

ios/grit_whitelist.txt

@@ -99,6 +99,7 @@ IDS_APP_LAUNCHER_OPEN_IN_LABEL_MOBILE
 IDS_APP_LAUNCHER_OPEN_ONCE_BUTTON_MOBILE
 IDS_APP_UNTITLED_SHORTCUT_FILE_NAME
 IDS_AUTOCOMPLETE_SEARCH_DESCRIPTION
+IDS_AUTOFILL_ADDRESS_LINE_SEPARATOR
 IDS_AUTOFILL_ADDRESS_SUMMARY_SEPARATOR
 IDS_AUTOFILL_CC_AMEX
 IDS_AUTOFILL_CC_DINERS