GitLab

The drive::DownloadHandler was using the assumption that all
non-IN_PROGRESS downloads that are created were restored from history.
This is not a safe assumption.

Instead query the DownloadHistory to determine whether a new download
was restored from history or not.

Depends on https://codereview.chromium.org/230103002/ which adds a
WasDownloadRestoredFromHistory method to DownloadHistory.

BUG=7648

Review URL: https://codereview.chromium.org/230133002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@271595 0039d316-1c4b-4281-b951-d872f2087c98