Clear out the float-lists from a ruby base when moving its children

Clear out the float-lists from a ruby base when moving its children

A follow up to https://codereview.chromium.org/2329863002 and
https://codereview.chromium.org/2645473004. When moving children from one
base to another clear down the float lists of all descendants - seems like
'it's the only way to be sure'.

BUG=683104
Review-Url: https://codereview.chromium.org/2653113002
Cr-Commit-Position: refs/heads/master@{#446410}
(cherry picked from commit fa2a16567af6fc774c0a9fe44fb53eb5135056b0)

Review-Url: https://codereview.chromium.org/2659303004 .
Cr-Commit-Position: refs/branch-heads/2987@{#173}
Cr-Branched-From: ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed: https://chromium.googlesource.com/chromium/src/+/47603830c84360e6074df0d3e6b1c74f99a4bd3a

[rhogan, 2017-01-30 19:47:17]

Description was changed from

==========
Clear out the float-lists from a ruby base when moving its children

A follow up to https://codereview.chromium.org/2329863002 and
https://codereview.chromium.org/2645473004. When moving children from one
base to another clear down the float lists of all descendants - seems like
'it's the only way to be sure'.

BUG=683104

Review-Url: https://codereview.chromium.org/2653113002
Cr-Commit-Position: refs/heads/master@{#446410}
(cherry picked from commit fa2a16567af6fc774c0a9fe44fb53eb5135056b0)
==========

to

==========
Clear out the float-lists from a ruby base when moving its children

A follow up to https://codereview.chromium.org/2329863002 and
https://codereview.chromium.org/2645473004. When moving children from one
base to another clear down the float lists of all descendants - seems like
'it's the only way to be sure'.

BUG=683104

Review-Url: https://codereview.chromium.org/2653113002
Cr-Commit-Position: refs/heads/master@{#446410}
(cherry picked from commit fa2a16567af6fc774c0a9fe44fb53eb5135056b0)

Review-Url: https://codereview.chromium.org/2659303004 .
Cr-Commit-Position: refs/branch-heads/2987@{#173}
Cr-Branched-From:
ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed:
https://chromium.googlesource.com/chromium/src/+/47603830c84360e6074df0d3e6b1...
==========

[rhogan, 2017-01-30 19:47:18]

Committed patchset #1 (id:1) manually as
47603830c84360e6074df0d3e6b1c74f99a4bd3a.