The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/092e1b75d75d7e74297f7cf1ea52bcf22924e167

commit 092e1b75d75d7e74297f7cf1ea52bcf22924e167
Author: mathp <mathp@chromium.org>
Date: Fri May 20 20:43:56 2016

Use autocomplete attributes, if available, as the golden truth basis for implementing a quality metric for heuristics and server predictions.

Also, still apply server predictions to fields, even though an autocomplete attribute is present elsewhere in the form.

BUG= 613558 
TEST=AutofillMetricsTest, FormStructureTest.

Review-Url: https://codereview.chromium.org/2003563003
Cr-Commit-Position: refs/heads/master@{#395158}

[modify] https://crrev.com/092e1b75d75d7e74297f7cf1ea52bcf22924e167/components/autofill/core/browser/autofill_manager.cc
[modify] https://crrev.com/092e1b75d75d7e74297f7cf1ea52bcf22924e167/components/autofill/core/browser/autofill_manager.h
[modify] https://crrev.com/092e1b75d75d7e74297f7cf1ea52bcf22924e167/components/autofill/core/browser/autofill_metrics.cc
[modify] https://crrev.com/092e1b75d75d7e74297f7cf1ea52bcf22924e167/components/autofill/core/browser/autofill_metrics.h
[modify] https://crrev.com/092e1b75d75d7e74297f7cf1ea52bcf22924e167/components/autofill/core/browser/autofill_metrics_unittest.cc
[modify] https://crrev.com/092e1b75d75d7e74297f7cf1ea52bcf22924e167/components/autofill/core/browser/form_structure.cc
[modify] https://crrev.com/092e1b75d75d7e74297f7cf1ea52bcf22924e167/components/autofill/core/browser/form_structure.h
[modify] https://crrev.com/092e1b75d75d7e74297f7cf1ea52bcf22924e167/components/autofill/core/browser/form_structure_unittest.cc
[modify] https://crrev.com/092e1b75d75d7e74297f7cf1ea52bcf22924e167/tools/metrics/histograms/histograms.xml

Moving this nonessential bug to the next milestone.

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