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- Linked agains gdi+ to use their image converting tools.
- Now when downloading the profile picture, the largest downloaded
picture will also be converted into .bmp and saved into the same
directory.
- Override the GetBitmapValue of the credential to read this bmp
file and return it.

Bug: 936847
Change-Id: Ie36b99e167c828ed7b46b88c400465f5fca44fd2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1497192
Commit-Queue: Tien Mai <tienmai@chromium.org>
Reviewed-by: Roger Tawa <rogerta@chromium.org>
Cr-Commit-Position: refs/heads/master@{#638212}