Merge to m55: Geneneralized fix for serialization error/reset issues

Merge to m55: Geneneralized fix for serialization error/reset issues

Whenever we see an AX tree fail to unserialize, request it be reset on the source end.

TEST=in hotrod, repeatedly toggle on/off ChromeVox. Verify that we re-populate the tree when we get any events (e.g. focus).
BUG=667819
Review-Url: https://codereview.chromium.org/2522033002
Cr-Commit-Position: refs/heads/master@{#433985}
(cherry picked from commit 38c63d7344c76d9fa58c84db6112daebbfefd3ab)

TBR=dtseng@chromium.org

Committed: https://chromium.googlesource.com/chromium/src/+/1abab3b6017f1e75d2cc6734c333238b6cb0c856

[David Tseng, 2016-12-06 22:34:08]

Description was changed from

==========
Merge to m55: Geneneralized fix for serialization error/reset issues

Whenever we see an AX tree fail to unserialize, request it be reset on the
source end.

TEST=in hotrod, repeatedly toggle on/off ChromeVox. Verify that we re-populate
the tree when we get any events (e.g. focus).
BUG=667819

Review-Url: https://codereview.chromium.org/2522033002
Cr-Commit-Position: refs/heads/master@{#433985}
(cherry picked from commit 38c63d7344c76d9fa58c84db6112daebbfefd3ab)
==========

to

==========
Merge to m55: Geneneralized fix for serialization error/reset issues

Whenever we see an AX tree fail to unserialize, request it be reset on the
source end.

TEST=in hotrod, repeatedly toggle on/off ChromeVox. Verify that we re-populate
the tree when we get any events (e.g. focus).
BUG=667819

Review-Url: https://codereview.chromium.org/2522033002
Cr-Commit-Position: refs/heads/master@{#433985}
(cherry picked from commit 38c63d7344c76d9fa58c84db6112daebbfefd3ab)

TBR=dtseng@chromium.org
==========

[David Tseng, 2016-12-06 22:42:11]

Description was changed from

==========
Merge to m55: Geneneralized fix for serialization error/reset issues

Whenever we see an AX tree fail to unserialize, request it be reset on the
source end.

TEST=in hotrod, repeatedly toggle on/off ChromeVox. Verify that we re-populate
the tree when we get any events (e.g. focus).
BUG=667819

Review-Url: https://codereview.chromium.org/2522033002
Cr-Commit-Position: refs/heads/master@{#433985}
(cherry picked from commit 38c63d7344c76d9fa58c84db6112daebbfefd3ab)

TBR=dtseng@chromium.org
==========

to

==========
Merge to m55: Geneneralized fix for serialization error/reset issues

Whenever we see an AX tree fail to unserialize, request it be reset on the
source end.

TEST=in hotrod, repeatedly toggle on/off ChromeVox. Verify that we re-populate
the tree when we get any events (e.g. focus).
BUG=667819

Review-Url: https://codereview.chromium.org/2522033002
Cr-Commit-Position: refs/heads/master@{#433985}
(cherry picked from commit 38c63d7344c76d9fa58c84db6112daebbfefd3ab)

TBR=dtseng@chromium.org

Committed:
https://chromium.googlesource.com/chromium/src/+/1abab3b6017f1e75d2cc6734c333...
==========

[David Tseng, 2016-12-06 22:42:12]

Committed patchset #1 (id:1) manually as
1abab3b6017f1e75d2cc6734c333238b6cb0c856 (presubmit successful).