URLs (if applicable) : https://online.pumb.ua/

What steps will reproduce the problem?
1. Run browser with enabled DCHECKs.
2. Open https://online.pumb.ua/.
3. Observe DCHECK hit.

What is the expected result?
No DCHECK hit.

What happens instead of that?
DCHECK hit.

In  http://crbug.com/427622  were added ignore of "lookup"-named address fields,
this ignore moves scanner forward, and if ignored field is the last in the form,
then next Parse* calls inside of AddressField::Parse is invalid.

Proposed fix is to move this ignore logic to the beginning of
AddressField::Parse().

I'll assign CL soon to this bug.



[6604:6036:0314/142507:FATAL:autofill_scanner.cc(41)] Check failed: saved_cursor_ != end_.
Backtrace:
        base::debug::StackTrace::StackTrace [0x100976D1+33] (c:\browser\chromium\chromium\src\base\debug\stack_trace_win.cc:215)
        logging::LogMessage::~LogMessage [0x100EC5EB+75] (c:\browser\chromium\chromium\src\base\logging.cc:522)
        autofill::AutofillScanner::Rewind [0x071CD9AB+251] (c:\browser\chromium\chromium\src\components\autofill\core\browser\autofill_scanner.cc:41)
        autofill::AddressField::ParseCountry [0x07173BC0+160] (c:\browser\chromium\chromium\src\components\autofill\core\browser\address_field.cc:244)
        autofill::AddressField::Parse [0x07172E92+306] (c:\browser\chromium\chromium\src\components\autofill\core\browser\address_field.cc:63)
        autofill::FormField::ParseFormFieldsPass [0x071EAB7F+63] (c:\browser\chromium\chromium\src\components\autofill\core\browser\form_field.cc:177)
        autofill::FormField::ParseFormFields [0x071EA9E9+169] (c:\browser\chromium\chromium\src\components\autofill\core\browser\form_field.cc:71)
        autofill::FormStructure::DetermineHeuristicTypes [0x071F2E82+162] (c:\browser\chromium\chromium\src\components\autofill\core\browser\form_structure.cc:366)
        autofill::AutofillManager::ParseForms [0x071A48B3+307] (c:\browser\chromium\chromium\src\components\autofill\core\browser\autofill_manager.cc:1673)
        autofill::AutofillManager::OnFormsSeen [0x071A3221+289] (c:\browser\chromium\chromium\src\components\autofill\core\browser\autofill_manager.cc:256)
        base::DispatchToMethodImpl<autofill::AutofillManager *,void (__thiscall autofill::AutofillManager::*)(std::vector<autofill::FormData,std::allocator<autofill::FormData> > const &,base::TimeTicks const &),std::vector<autofill::FormData,std::allocator<autofi [0x07693CCD+61] (c:\browser\chromium\chromium\src\base\tuple.h:166)
        base::DispatchToMethod<autofill::AutofillManager *,void (__thiscall autofill::AutofillManager::*)(std::vector<autofill::FormData,std::allocator<autofill::FormData> > const &,base::TimeTicks const &),std::vector<autofill::FormData,std::allocator<autofill:: [0x0769372A+42] (c:\browser\chromium\chromium\src\base\tuple.h:173)
        IPC::DispatchToMethod<autofill::AutofillManager,void (__thiscall autofill::AutofillManager::*)(std::vector<autofill::FormData,std::allocator<autofill::FormData> > const &,base::TimeTicks const &),void,std::tuple<std::vector<autofill::FormData,std::allocat [0x07693A08+24] (c:\browser\chromium\chromium\src\ipc\ipc_message_templates.h:25)
        IPC::MessageT<AutofillHostMsg_FormsSeen_Meta,std::tuple<std::vector<autofill::FormData,std::allocator<autofill::FormData> >,base::TimeTicks>,void>::Dispatch<autofill::AutofillManager,autofill::ContentAutofillDriver,void,void (__thiscall autofill::Autofill [0x07692CCE+94] (c:\browser\chromium\chromium\src\ipc\ipc_message_templates.h:119)
        autofill::ContentAutofillDriver::HandleMessage [0x07694792+418] (c:\browser\chromium\chromium\src\components\autofill\content\browser\content_autofill_driver.cc:172)
        autofill::ContentAutofillDriverFactory::OnMessageReceived [0x0769A6DF+47] (c:\browser\chromium\chromium\src\components\autofill\content\browser\content_autofill_driver_factory.cc:73)
        content::WebContentsImpl::OnMessageReceived [0x164F7834+420] (c:\browser\chromium\chromium\src\content\browser\web_contents\web_contents_impl.cc:576)
        content::WebContentsImpl::OnMessageReceived [0x164FA283+35] (c:\browser\chromium\chromium\src\content\browser\web_contents\web_contents_impl.cc:3808)
        content::RenderFrameHostImpl::OnMessageReceived [0x1598FFDA+474] (c:\browser\chromium\chromium\src\content\browser\frame_host\render_frame_host_impl.cc:507)
        content::RenderProcessHostImpl::OnMessageReceived [0x160CBBAA+1994] (c:\browser\chromium\chromium\src\content\browser\renderer_host\render_process_host_impl.cc:1804)
		...