Support Windows FILE_FLAG_SEQUENTIAL_SCAN in base::File.

Support Windows FILE_FLAG_SEQUENTIAL_SCAN in base::File.

FILE_FLAG_SEQUENTIAL_SCAN is a hint to the system that a file will be
read sequentially from beginning to end.

It is required to pre-read modules efficiently.

BUG=547794
Committed: https://crrev.com/2c32fabc2c602ee66bc63f9aec180ae60612302d
Cr-Commit-Position: refs/heads/master@{#357151}

[fdoray, 2015-10-30 16:56:28]

fdoray@chromium.org changed reviewers:
+ thestig@chromium.org

[fdoray, 2015-10-30 16:56:29]

thestig@: Could you review this CL? Thanks.

A reviewer recommended that I add this flag to base::File instead of using raw
::CreateFile in https://codereview.chromium.org/1412673006/

[Lei Zhang, 2015-10-30 17:25:55]

lgtm

[fdoray, 2015-10-30 17:27:45]

The CQ bit was checked by fdoray@chromium.org

[commit-bot: I haz the power, 2015-10-30 17:28:42]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1424943006/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1424943006/1

[commit-bot: I haz the power, 2015-10-30 18:44:47]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-10-30 18:45:51]

Patchset 1 (id:??) landed as
https://crrev.com/2c32fabc2c602ee66bc63f9aec180ae60612302d
Cr-Commit-Position: refs/heads/master@{#357151}