MHTML: Allows 'data:' URLs to be processed using normal request processing.

MHTML: Allows 'data:' URLs to be processed using normal request processing.

An alternative of allowing Blink to parse data URLs for all content-types
was considered, but this breaks behavior elsewhere in blink that requires
fonts defined in 'data:' URLs but not referenced never be decoded.
Instead, we stop sandboxing requests for 'data:' URLs and allow them to
use the normal request machinery.

BUG=647122
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:win7_blink_dbg,linux_precise_blink_rel,linux_precise_blink_dbg,mac10.9_blink_dbg,mac10.9_blink_rel,win7_blink_rel,mac10.10_blink_rel,mac10.11_blink_rel,mac10.11_retina_blink_rel,win10_blink_rel,linux_trusty_blink_rel

Review-Url: https://codereview.chromium.org/2346293002
Cr-Commit-Position: refs/heads/master@{#420365}
(cherry picked from commit 4204367ed53fb3ba794678d78e7d4fc149f17787)

Committed: https://chromium.googlesource.com/chromium/src/+/329811b9f577cc8f1484ba82a46dfdb91d95fdcd

[dewittj, 2016-09-22 17:54:17]

Description was changed from

==========
MHTML: Allows 'data:' URLs to be processed using normal request processing.

An alternative of allowing Blink to parse data URLs for all content-types
was considered, but this breaks behavior elsewhere in blink that requires
fonts defined in 'data:' URLs but not referenced never be decoded.
Instead, we stop sandboxing requests for 'data:' URLs and allow them to
use the normal request machinery.

BUG=647122
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:win7_blink_dbg,linux_precise_blink_rel,linux_precise_blink_dbg,mac10.9_blink_dbg,mac10.9_blink_rel,win7_blink_rel,mac10.10_blink_rel,mac10.11_blink_rel,mac10.11_retina_blink_rel,win10_blink_rel,linux_trusty_blink_rel

Review-Url: https://codereview.chromium.org/2346293002
Cr-Commit-Position: refs/heads/master@{#420365}
(cherry picked from commit 4204367ed53fb3ba794678d78e7d4fc149f17787)
==========

to

==========
MHTML: Allows 'data:' URLs to be processed using normal request processing.

An alternative of allowing Blink to parse data URLs for all content-types
was considered, but this breaks behavior elsewhere in blink that requires
fonts defined in 'data:' URLs but not referenced never be decoded.
Instead, we stop sandboxing requests for 'data:' URLs and allow them to
use the normal request machinery.

BUG=647122
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:win7_blink_dbg,linux_precise_blink_rel,linux_precise_blink_dbg,mac10.9_blink_dbg,mac10.9_blink_rel,win7_blink_rel,mac10.10_blink_rel,mac10.11_blink_rel,mac10.11_retina_blink_rel,win10_blink_rel,linux_trusty_blink_rel

Review-Url: https://codereview.chromium.org/2346293002
Cr-Commit-Position: refs/heads/master@{#420365}
(cherry picked from commit 4204367ed53fb3ba794678d78e7d4fc149f17787)

Committed:
https://chromium.googlesource.com/chromium/src/+/329811b9f577cc8f1484ba82a46d...
==========

[dewittj, 2016-09-22 17:54:19]

Committed patchset #1 (id:1) manually as
329811b9f577cc8f1484ba82a46dfdb91d95fdcd.