Fix invalid cast in tile_manager_perftest.

Fix invalid cast in tile_manager_perftest.

Use TileTask instead of RasterTask, because TaskSetFinishedTaskImpl
could be there as well. The bug was found by Control Flow Integrity check,
and is similar to two previously fixed bugs:

https://codereview.chromium.org/1494273002/
https://codereview.chromium.org/1248923002

BUG=568407, 457523
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Committed: https://crrev.com/6f7d86825b5f5e146b8e45a7e72eebd6d33a5c35
Cr-Commit-Position: refs/heads/master@{#364441}

[krasin, 2015-12-10 04:23:24]

Description was changed from

==========
Fix invalid cast in tile_manager_perftest.

Use TileTask instead of RasterTask, because TaskSetFinishedTaskImpl
could be there as well. The bug was found by Control Flow Integrity check,
and is similar to two previously fixed bugs:

https://codereview.chromium.org/1494273002/
https://codereview.chromium.org/1248923002

BUG=568407,457523
==========

to

==========
Fix invalid cast in tile_manager_perftest.

Use TileTask instead of RasterTask, because TaskSetFinishedTaskImpl
could be there as well. The bug was found by Control Flow Integrity check,
and is similar to two previously fixed bugs:

https://codereview.chromium.org/1494273002/
https://codereview.chromium.org/1248923002

BUG=568407,457523
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
==========

[krasin, 2015-12-10 04:27:02]

krasin@google.com changed reviewers:
+ enne@chromium.org

[vmpstr, 2015-12-10 18:10:00]

vmpstr@chromium.org changed reviewers:
+ vmpstr@chromium.org

[vmpstr, 2015-12-10 18:10:00]

lgtm

[krasin, 2015-12-10 19:22:02]

The CQ bit was checked by krasin@google.com

[commit-bot: I haz the power, 2015-12-10 19:24:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1515843002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1515843002/1

[commit-bot: I haz the power, 2015-12-10 19:53:11]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-12-10 19:54:49]

Description was changed from

==========
Fix invalid cast in tile_manager_perftest.

Use TileTask instead of RasterTask, because TaskSetFinishedTaskImpl
could be there as well. The bug was found by Control Flow Integrity check,
and is similar to two previously fixed bugs:

https://codereview.chromium.org/1494273002/
https://codereview.chromium.org/1248923002

BUG=568407,457523
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
==========

to

==========
Fix invalid cast in tile_manager_perftest.

Use TileTask instead of RasterTask, because TaskSetFinishedTaskImpl
could be there as well. The bug was found by Control Flow Integrity check,
and is similar to two previously fixed bugs:

https://codereview.chromium.org/1494273002/
https://codereview.chromium.org/1248923002

BUG=568407,457523
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Committed: https://crrev.com/6f7d86825b5f5e146b8e45a7e72eebd6d33a5c35
Cr-Commit-Position: refs/heads/master@{#364441}
==========

[commit-bot: I haz the power, 2015-12-10 19:54:50]

Patchset 1 (id:??) landed as
https://crrev.com/6f7d86825b5f5e146b8e45a7e72eebd6d33a5c35
Cr-Commit-Position: refs/heads/master@{#364441}