Use previous target path when resuming a download after crash

Use previous target path when resuming a download after crash

When resuming a download after browser crash, Chrome will regenerate the target path.
This could reintroduce name conflict if user has resolved a conflict before the crash.
This CL reuses the previous target path Chrome has already generated for the download.

BUG=678835
TBR=asanka@chromium.org

Review-Url: https://codereview.chromium.org/2618743006
Cr-Commit-Position: refs/heads/master@{#446218}
(cherry picked from commit 41231a3e20197bf9499332f02c69a426186f5fbe)

Review-Url: https://codereview.chromium.org/2665463002 .
Cr-Commit-Position: refs/branch-heads/2987@{#154}
Cr-Branched-From: ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed: https://chromium.googlesource.com/chromium/src/+/7e8d5bafdb010fa97aaecb9e0ebf61f462129366

[qinmin, 2017-01-27 21:36:03]

Description was changed from

==========
Use previous target path when resuming a download after crash

When resuming a download after browser crash, Chrome will regenerate the target
path.
This could reintroduce name conflict if user has resolved a conflict before the
crash.
This CL reuses the previous target path Chrome has already generated for the
download.

BUG=678835
TBR=asanka@chromium.org

Review-Url: https://codereview.chromium.org/2618743006
Cr-Commit-Position: refs/heads/master@{#446218}
(cherry picked from commit 41231a3e20197bf9499332f02c69a426186f5fbe)
==========

to

==========
Use previous target path when resuming a download after crash

When resuming a download after browser crash, Chrome will regenerate the target
path.
This could reintroduce name conflict if user has resolved a conflict before the
crash.
This CL reuses the previous target path Chrome has already generated for the
download.

BUG=678835
TBR=asanka@chromium.org

Review-Url: https://codereview.chromium.org/2618743006
Cr-Commit-Position: refs/heads/master@{#446218}
(cherry picked from commit 41231a3e20197bf9499332f02c69a426186f5fbe)

Review-Url: https://codereview.chromium.org/2665463002 .
Cr-Commit-Position: refs/branch-heads/2987@{#154}
Cr-Branched-From:
ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed:
https://chromium.googlesource.com/chromium/src/+/7e8d5bafdb010fa97aaecb9e0ebf...
==========

[qinmin, 2017-01-27 21:36:04]

Committed patchset #1 (id:1) manually as
7e8d5bafdb010fa97aaecb9e0ebf61f462129366 (presubmit successful).