[Offline Pages] Fix several infobar bugs.

[Offline Pages] Fix several infobar bugs.

* Overwrite button now deletes all page downloads with the same URL before saving the new page
* Folder name is now called "Downloads"
* Folder link now opens "Downloads home"

BUG=653936
Review-Url: https://codereview.chromium.org/2400213003
Cr-Commit-Position: refs/heads/master@{#424569}
(cherry picked from commit 6a97d07086a724662167d73893ab9d2ab00605d1)

Committed: https://chromium.googlesource.com/chromium/src/+/95bb537b8bc68e1c24a517976bb078373e9c66a8

[dewittj, 2016-10-13 18:42:18]

Description was changed from

==========
[Offline Pages] Fix several infobar bugs.

* Overwrite button now deletes all page downloads with the same URL before
saving the new page
* Folder name is now called "Downloads"
* Folder link now opens "Downloads home"

BUG=653936

Review-Url: https://codereview.chromium.org/2400213003
Cr-Commit-Position: refs/heads/master@{#424569}
(cherry picked from commit 6a97d07086a724662167d73893ab9d2ab00605d1)
==========

to

==========
[Offline Pages] Fix several infobar bugs.

* Overwrite button now deletes all page downloads with the same URL before
saving the new page
* Folder name is now called "Downloads"
* Folder link now opens "Downloads home"

BUG=653936

Review-Url: https://codereview.chromium.org/2400213003
Cr-Commit-Position: refs/heads/master@{#424569}
(cherry picked from commit 6a97d07086a724662167d73893ab9d2ab00605d1)

Committed:
https://chromium.googlesource.com/chromium/src/+/95bb537b8bc68e1c24a517976bb0...
==========

[dewittj, 2016-10-13 18:42:19]

Committed patchset #1 (id:1) manually as
95bb537b8bc68e1c24a517976bb078373e9c66a8.