[iOS] Add HistoryDatabaseParamsForPath in //components/history/ios/browser

Add new helper method to construct an HistoryDatabaseParams for a FilePath
on iOS. Constants used for DownloadInterruptReason are based on the values
from content/public/browser/download_interrupt_reasons.h.

BUG=370850

Review URL: https://codereview.chromium.org/1106763002

Cr-Commit-Position: refs/heads/master@{#326808}
3 files changed