Don't categorize back/forward continuations as reloads.
Don't categorize back/forward continuations as reloads.

If a reload turns into a loadHistoryItem with a reload-like cachePolicy and
that reload then generates an error, still categorize the navigation as a
back/forward navigation. The check for a ReloadIgnoringCacheData cachePolicy
was happening before and miscategorizing those navigations as reloads.

BUG=348918

Review URL: https://codereview.chromium.org/188063003

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@168839 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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