Add haptic feedback for selection change and action trigger.

Add haptic feedback for selection change and action trigger.

For iOS10+, trigger haptic feedback during gesture tracking when the
selection changes, as well as a different haptic when the user picks
an action, either by tapping the item or ending the drag.

BUG=690017
TEST=A small bump should be felt on iPhone7 devices when the user
changes the selection. A larger bump should be felt when selecting an
action. This requires manual testing.

Review-Url: https://codereview.chromium.org/2680343002
Cr-Commit-Position: refs/heads/master@{#449334}
Committed: https://chromium.googlesource.com/chromium/src/+/e99939bdc44859ee5d918fe424f7d2110cda68e7

[pink (ping after 24hrs), 2017-02-08 15:34:53]

pinkerton@chromium.org changed reviewers:
+ jif@chromium.org

[jif, 2017-02-08 21:14:57]

I tried storing the UISelectionFeedbackGenerator and calling |prepare| after
|triggerHapticFeedbackForSelectionChange| was called, but I did not feel any
difference in the latency, so the approach of creating the objects when needed
is OK.
Also, I don't think we need to put this behind an experimental setting, so lgtm

[pink (ping after 24hrs), 2017-02-09 17:01:26]

The CQ bit was checked by pinkerton@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-02-09 17:02:27]

Dry run: 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, 2017-02-09 17:15:05]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-02-09 17:15:06]

Dry run: This issue passed the CQ dry run.

[pink (ping after 24hrs), 2017-02-09 17:16:22]

The CQ bit was checked by pinkerton@chromium.org

[commit-bot: I haz the power, 2017-02-09 17:16:51]

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, 2017-02-09 17:22:41]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1486660582660200, "parent_rev":
"1df4de1e3c5fa46a402a4b6d07be55e40cdcba50", "commit_rev":
"e99939bdc44859ee5d918fe424f7d2110cda68e7"}

[commit-bot: I haz the power, 2017-02-09 17:23:18]

Description was changed from

==========
Add haptic feedback for selection change and action trigger.

For iOS10+, trigger haptic feedback during gesture tracking when the
selection changes, as well as a different haptic when the user picks
an action, either by tapping the item or ending the drag.

BUG=690017
TEST=A small bump should be felt on iPhone7 devices when the user
changes the selection. A larger bump should be felt when selecting an
action. This requires manual testing.
==========

to

==========
Add haptic feedback for selection change and action trigger.

For iOS10+, trigger haptic feedback during gesture tracking when the
selection changes, as well as a different haptic when the user picks
an action, either by tapping the item or ending the drag.

BUG=690017
TEST=A small bump should be felt on iPhone7 devices when the user
changes the selection. A larger bump should be felt when selecting an
action. This requires manual testing.

Review-Url: https://codereview.chromium.org/2680343002
Cr-Commit-Position: refs/heads/master@{#449334}
Committed:
https://chromium.googlesource.com/chromium/src/+/e99939bdc44859ee5d918fe424f7...
==========

[commit-bot: I haz the power, 2017-02-09 17:23:19]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/e99939bdc44859ee5d918fe424f7...