[Merge-M56] arc: Fix duplicate icons in app launcher in case of crash.

[Merge-M56] arc: Fix duplicate icons in app launcher in case of crash.

This CL initializes tracking items by existing app set on start in
order to prevent race condition that leads to arc app created is
called twice for some apps.

TBR=xiyuan@chromium.org
NOTRY=true
NOPRESUBMIT=true

TEST=Extended unit_tests
TEST=Manually on device with chrome://inducebrowsercrashforrealz
BUG=b/32765086
BUG=667529
Review-Url: https://codereview.chromium.org/2520173002
Cr-Commit-Position: refs/heads/master@{#433980}
(cherry picked from commit 4e1e8774f3b147906917dbd4e50f30bfc7372ba6)

[khmel, 2016-11-30 19:10:52]

Description was changed from

==========
arc: Fix duplicate icons in app launcher in case of crash.

This CL initializes tracking items by existing app set on start in
order to prevent race condition that leads to arc app created is
called twice for some apps.

TBR=xiyuan@chromium.org

TEST=Extended unit_tests
TEST=Manually on device with chrome://inducebrowsercrashforrealz
BUG=b/32765086
BUG=667529

Review-Url: https://codereview.chromium.org/2520173002
Cr-Commit-Position: refs/heads/master@{#433980}
(cherry picked from commit 4e1e8774f3b147906917dbd4e50f30bfc7372ba6)
==========

to

==========
[Merge-M56] arc: Fix duplicate icons in app launcher in case of crash.

This CL initializes tracking items by existing app set on start in
order to prevent race condition that leads to arc app created is
called twice for some apps.

TBR=xiyuan@chromium.org
NOTRY=true
NOPRESUBMIT=true

TEST=Extended unit_tests
TEST=Manually on device with chrome://inducebrowsercrashforrealz
BUG=b/32765086
BUG=667529

Review-Url: https://codereview.chromium.org/2520173002
Cr-Commit-Position: refs/heads/master@{#433980}
(cherry picked from commit 4e1e8774f3b147906917dbd4e50f30bfc7372ba6)
==========

[khmel, 2016-11-30 19:14:17]

The CQ bit was checked by khmel@chromium.org

[commit-bot: I haz the power, 2016-11-30 19:14:45]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-11-30 19:20:08]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1480533257227140,
"parent_rev": "9935939dea8a52f4a5cb6a480d2b4f1fe15c4443", "commit_rev":
"40c25f2f1c6af573ffa17884c382b1e1a7c278b0"}

[commit-bot: I haz the power, 2016-11-30 19:20:37]

Description was changed from

==========
[Merge-M56] arc: Fix duplicate icons in app launcher in case of crash.

This CL initializes tracking items by existing app set on start in
order to prevent race condition that leads to arc app created is
called twice for some apps.

TBR=xiyuan@chromium.org
NOTRY=true
NOPRESUBMIT=true

TEST=Extended unit_tests
TEST=Manually on device with chrome://inducebrowsercrashforrealz
BUG=b/32765086
BUG=667529

Review-Url: https://codereview.chromium.org/2520173002
Cr-Commit-Position: refs/heads/master@{#433980}
(cherry picked from commit 4e1e8774f3b147906917dbd4e50f30bfc7372ba6)
==========

to

==========
[Merge-M56] arc: Fix duplicate icons in app launcher in case of crash.

This CL initializes tracking items by existing app set on start in
order to prevent race condition that leads to arc app created is
called twice for some apps.

TBR=xiyuan@chromium.org
NOTRY=true
NOPRESUBMIT=true

TEST=Extended unit_tests
TEST=Manually on device with chrome://inducebrowsercrashforrealz
BUG=b/32765086
BUG=667529

Review-Url: https://codereview.chromium.org/2520173002
Cr-Commit-Position: refs/heads/master@{#433980}
(cherry picked from commit 4e1e8774f3b147906917dbd4e50f30bfc7372ba6)
==========

[commit-bot: I haz the power, 2016-11-30 19:20:37]

Committed patchset #2 (id:20001)