Reduce creation of ViewsDelegate

Reduce creation of ViewsDelegate

By consolidating override of OnBeforeWidgetInit that finds shell many
of the places that were setting a viewsdelegate no longer need to.

Also, made AshTestHelper install a ViewsDelegate so that tests don't have.

Because of removed an include of views_delegate from ash_test_helper I had to update some includes.

BUG=none
TEST=none
R=ben@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=270290

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=270399

[Ben Goodger (Google), 2014-05-13 19:41:03]

lgtm

[sky, 2014-05-13 19:41:17]

The CQ bit was checked by sky@chromium.org

[commit-bot: I haz the power, 2014-05-13 19:43:31]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/sky@chromium.org/280863002/1

[sky, 2014-05-13 21:55:25]

The CQ bit was checked by sky@chromium.org

[commit-bot: I haz the power, 2014-05-13 22:04:53]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/sky@chromium.org/280863002/40001

[commit-bot: I haz the power, 2014-05-14 01:56:16]

Change committed as 270290

[sky, 2014-05-14 05:31:19]

This was reverted as it broke windows compile. Because I removed an include a
couple of tests in ash broke as they define CreateWindow and need to include
widget.h so that Createwindow is undefined. Diff between 4 and 5 to see changes.

I'm going to reland.

[sky, 2014-05-14 05:31:32]

The CQ bit was checked by sky@chromium.org

[commit-bot: I haz the power, 2014-05-14 05:32:25]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/sky@chromium.org/280863002/80001

[commit-bot: I haz the power, 2014-05-14 07:12:58]

FYI, CQ is re-trying this CL (attempt #1).
Please consider checking whether the failures are real,
and report flakes to chrome-troopers@google.com.
The failing builders are:
  android_aosp on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/android_aosp/builds/7...)
  ios_rel_device on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/ios_rel_device/builds...)
  ios_rel_device_ninja on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/ios_rel_device_ninja/...)

[commit-bot: I haz the power, 2014-05-14 07:16:32]

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

[commit-bot: I haz the power, 2014-05-14 07:16:32]

Try jobs failed on following builders:
  android_aosp on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/android_aosp/builds/7...)

[sky, 2014-05-14 14:08:35]

Committed patchset #5 manually as r270399 (presubmit successful).