GitLab

Refactor only change.

Move data conversions into FileHelper where path translation and file
sharing for VMs can be done.

The current code assumes only Arc is using this code, but we will soon
support crostini and pluginvm.

FileHelper::GetFilenames receives a list of files from the source window
and returns a list of ui::FileInfo.  To support this,
DragDropOperation::GetFilenames has been refactored to take FileHelper
and aura::Window*.

FileHelper::GetMimeTypeForUriList now takes target window since the mime
type will be different based on target.

FileHelper::GetUrlFromPath changed to SendFileInfo which takes a
callback to run when data is ready. The async callback allows files to
be shared with a VM before sending the data.

FileHelper::GetUrlsFromPickle changed to SendPickle which also takes a
callback to run when data is ready.

Bug: 1144138
Change-Id: I0356d4681705df5be174ac1debff51f4903eb742
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2531087
Commit-Queue: Joel Hockey <joelhockey@chromium.org>
Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Cr-Commit-Position: refs/heads/master@{#827027}