The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/d5dcc18a2fd59efcb793b4c7cb5cf65d86bb42c8

commit d5dcc18a2fd59efcb793b4c7cb5cf65d86bb42c8
Author: Parastoo Geranmayeh <parastoog@google.com>
Date: Mon Jun 11 15:34:29 2018

[Autofill] Independent Heuristics for Search Fields

Search term fields can now only be predicted if they're adjacent to
an address field. By moving them to an independent parser, this will
not be the case anymore.

Bug:  848413 
Change-Id: I5a35e363314b58d75fefddb65b410ddcc840df9a
Reviewed-on: https://chromium-review.googlesource.com/1089371
Reviewed-by: Roger McFarlane <rogerm@chromium.org>
Commit-Queue: Parastoo Geranmayeh <parastoog@google.com>
Cr-Commit-Position: refs/heads/master@{#566010}
[modify] https://crrev.com/d5dcc18a2fd59efcb793b4c7cb5cf65d86bb42c8/components/autofill/core/browser/BUILD.gn
[modify] https://crrev.com/d5dcc18a2fd59efcb793b4c7cb5cf65d86bb42c8/components/autofill/core/browser/address_field.cc
[modify] https://crrev.com/d5dcc18a2fd59efcb793b4c7cb5cf65d86bb42c8/components/autofill/core/browser/address_field.h
[modify] https://crrev.com/d5dcc18a2fd59efcb793b4c7cb5cf65d86bb42c8/components/autofill/core/browser/address_field_unittest.cc
[modify] https://crrev.com/d5dcc18a2fd59efcb793b4c7cb5cf65d86bb42c8/components/autofill/core/browser/form_field.cc
[modify] https://crrev.com/d5dcc18a2fd59efcb793b4c7cb5cf65d86bb42c8/components/autofill/core/browser/form_field.h
[add] https://crrev.com/d5dcc18a2fd59efcb793b4c7cb5cf65d86bb42c8/components/autofill/core/browser/search_field.cc
[add] https://crrev.com/d5dcc18a2fd59efcb793b4c7cb5cf65d86bb42c8/components/autofill/core/browser/search_field.h
[add] https://crrev.com/d5dcc18a2fd59efcb793b4c7cb5cf65d86bb42c8/components/autofill/core/browser/search_field_unittest.cc
[modify] https://crrev.com/d5dcc18a2fd59efcb793b4c7cb5cf65d86bb42c8/components/autofill/core/common/autofill_regex_constants.cc