Explicitly include MacScrollTypes.h in view_messages.h

Explicitly include MacScrollTypes.h in view_messages.h

This header is currently included via WebScrollbarTheme.h (which is
needed for blink::ScrollerStyle). Explicitly including it makes the
dependency clearer.

Committed: https://crrev.com/55ed6487742610a8a396e261749badf74e9fb1aa
Cr-Commit-Position: refs/heads/master@{#348601}

[fs, 2015-09-11 10:50:59]

fs@opera.com changed reviewers:
+ kerrnel@chromium.org, palmer@chromium.org

[Greg K, 2015-09-11 16:16:46]

On 2015/09/11 11:32:31, fs wrote:

LGTM

[palmer, 2015-09-11 20:18:10]

lgtm

[fs, 2015-09-14 07:39:01]

The CQ bit was checked by fs@opera.com

[commit-bot: I haz the power, 2015-09-14 07:39:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1339613002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1339613002/1

[commit-bot: I haz the power, 2015-09-14 07:47:49]

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

[commit-bot: I haz the power, 2015-09-14 07:47:50]

Try jobs failed on following builders:
  chromium_presubmit on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

[fs, 2015-09-14 08:14:03]

fs@opera.com changed reviewers:
+ jochen@chromium.org

[fs, 2015-09-14 08:14:03]

+jochen for target-file DEPS

[jochen (gone - plz use gerrit), 2015-09-14 09:48:41]

lgtm

[fs, 2015-09-14 10:21:55]

The CQ bit was checked by fs@opera.com

[commit-bot: I haz the power, 2015-09-14 10:22:08]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1339613002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1339613002/1

[commit-bot: I haz the power, 2015-09-14 11:08:45]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-14 11:09:28]

Patchset 1 (id:??) landed as
https://crrev.com/55ed6487742610a8a396e261749badf74e9fb1aa
Cr-Commit-Position: refs/heads/master@{#348601}

[commit-bot: I haz the power, 2015-09-23 12:31:37]

Patchset 1 (id:??) landed as
https://crrev.com/55ed6487742610a8a396e261749badf74e9fb1aa
Cr-Commit-Position: refs/heads/master@{#348601}