[Merge M53] [Downloads] Path collision check should be case insensitive.

[Merge M53] [Downloads] Path collision check should be case insensitive.

If there are two on-going downloads with suggested paths that only
differ by case, they should be considered in conflict. Thus the download
that started later should end up with a uniquified path. Otherwise the
files may overwrite each other during the final rename.

R=svaldez@chromium.org
BUG=619516
Review-Url: https://codereview.chromium.org/2136673002
Cr-Commit-Position: refs/heads/master@{#404711}
(cherry picked from commit 3f4e2aada67ac99063cc7bddf88dddf6ed93e9c0)

Committed: https://chromium.googlesource.com/chromium/src/+/455b0f4daaac3f4cdeead3145446be08935dc030

[asanka, 2016-07-13 16:27:19]

Description was changed from

==========
[Merge M53] [Downloads] Path collision check should be case insensitive.

If there are two on-going downloads with suggested paths that only
differ by case, they should be considered in conflict. Thus the download
that started later should end up with a uniquified path. Otherwise the
files may overwrite each other during the final rename.

R=svaldez@chromium.org
BUG=619516

Review-Url: https://codereview.chromium.org/2136673002
Cr-Commit-Position: refs/heads/master@{#404711}
(cherry picked from commit 3f4e2aada67ac99063cc7bddf88dddf6ed93e9c0)
==========

to

==========
[Merge M53] [Downloads] Path collision check should be case insensitive.

If there are two on-going downloads with suggested paths that only
differ by case, they should be considered in conflict. Thus the download
that started later should end up with a uniquified path. Otherwise the
files may overwrite each other during the final rename.

R=svaldez@chromium.org
BUG=619516

Review-Url: https://codereview.chromium.org/2136673002
Cr-Commit-Position: refs/heads/master@{#404711}
(cherry picked from commit 3f4e2aada67ac99063cc7bddf88dddf6ed93e9c0)

Committed:
https://chromium.googlesource.com/chromium/src/+/455b0f4daaac3f4cdeead3145446...
==========

[asanka, 2016-07-13 16:27:21]

Committed patchset #1 (id:1) manually as
455b0f4daaac3f4cdeead3145446be08935dc030.