[Image Fetcher] Add data url support

Bug: 1015174
Change-Id: Ibb7a3cdfc0b66c57cd541feaec05c3ce72b03d05
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2121342
Reviewed-by: Brandon Wylie <wylieb@chromium.org>
Commit-Queue: Brandon Wylie <wylieb@chromium.org>
Cr-Commit-Position: refs/branch-heads/4044@{#851}
Cr-Branched-From: a6d9daf149a473ceea37f629c41d4527bf2055bd-refs/heads/master@{#737173}
3 files changed