Add a virtual destructor to PermissionPromptDelegate

Add a virtual destructor to PermissionPromptDelegate

This is needed so that subclass destructors will be called when
destroying a PermissionPromptDelegate pointer. This currently has no
impact on behavior since there are no subclass destructors.

BUG=596786
Review-Url: https://codereview.chromium.org/2836093006
Cr-Commit-Position: refs/heads/master@{#467617}
Committed: https://chromium.googlesource.com/chromium/src/+/8c5be5dd012c0fd37a655748e561e5f8f92b6112

[raymes, 2017-04-25 23:31:09]

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

[commit-bot: I haz the power, 2017-04-25 23:32:20]

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, 2017-04-26 00:27:25]

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

[commit-bot: I haz the power, 2017-04-26 00:27:26]

Dry run: This issue passed the CQ dry run.

[raymes, 2017-04-26 00:27:54]

raymes@chromium.org changed reviewers:
+ timloh@chromium.org

[Timothy Loh, 2017-04-26 02:55:47]

On 2017/04/26 00:27:54, raymes wrote:

lgtm

[raymes, 2017-04-27 06:42:13]

The CQ bit was checked by raymes@chromium.org

[commit-bot: I haz the power, 2017-04-27 06:42:32]

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, 2017-04-27 07:29:14]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1493275333701600, "parent_rev":
"2c6e211f16b282ce819a1c63e78ec2bfba7280f5", "commit_rev":
"8c5be5dd012c0fd37a655748e561e5f8f92b6112"}

[commit-bot: I haz the power, 2017-04-27 07:29:24]

Description was changed from

==========
Add a virtual destructor to PermissionPromptDelegate

This is needed so that subclass destructors will be called when
destroying a PermissionPromptDelegate pointer. This currently has no
impact on behavior since there are no subclass destructors.

BUG=596786
==========

to

==========
Add a virtual destructor to PermissionPromptDelegate

This is needed so that subclass destructors will be called when
destroying a PermissionPromptDelegate pointer. This currently has no
impact on behavior since there are no subclass destructors.

BUG=596786

Review-Url: https://codereview.chromium.org/2836093006
Cr-Commit-Position: refs/heads/master@{#467617}
Committed:
https://chromium.googlesource.com/chromium/src/+/8c5be5dd012c0fd37a655748e561...
==========

[commit-bot: I haz the power, 2017-04-27 07:29:25]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/8c5be5dd012c0fd37a655748e561...