Add Document encoding to header preloaded requests

Add Document encoding to header preloaded requests

When resources were preloaded using Link: headers, they weren't requested with
the document's charset, and therefore their decoding might have differed from non-preloaded resources.
This CL fixes that by requesting them with the right encoding.

BUG=615307
Review-Url: https://codereview.chromium.org/2019303002
Cr-Commit-Position: refs/heads/master@{#396735}
(cherry picked from commit 727d4183ad164bd4eaa4bde1c82eadb592e1c41c)

Committed: https://chromium.googlesource.com/chromium/src/+/c732f3b13215ca042376f72e361d8a140ea81802

[Yoav Weiss, 2016-05-31 21:26:32]

Description was changed from

==========
Add Document encoding to header preloaded requests

When resources were preloaded using Link: headers, they weren't requested with
the document's charset, and therefore their decoding might have differed from
non-preloaded resources.
This CL fixes that by requesting them with the right encoding.

BUG=615307

Review-Url: https://codereview.chromium.org/2019303002
Cr-Commit-Position: refs/heads/master@{#396735}
(cherry picked from commit 727d4183ad164bd4eaa4bde1c82eadb592e1c41c)
==========

to

==========
Add Document encoding to header preloaded requests

When resources were preloaded using Link: headers, they weren't requested with
the document's charset, and therefore their decoding might have differed from
non-preloaded resources.
This CL fixes that by requesting them with the right encoding.

BUG=615307

Review-Url: https://codereview.chromium.org/2019303002
Cr-Commit-Position: refs/heads/master@{#396735}
(cherry picked from commit 727d4183ad164bd4eaa4bde1c82eadb592e1c41c)

Committed:
https://chromium.googlesource.com/chromium/src/+/c732f3b13215ca042376f72e361d...
==========

[Yoav Weiss, 2016-05-31 21:26:34]

Committed patchset #1 (id:1) manually as
c732f3b13215ca042376f72e361d8a140ea81802.