Move NativeAppWindow to extensions

Move NativeAppWindow to extensions

Move native_app_window.h from apps/ui to extensions/browser/app_window.
Change the namespace from apps to extensions.
Add dependency on components/web_modal to extensions/browser.

BUG=403726
TBR=sky@chromium.org for include fix under chrome/browser

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=290786

[benwells, 2014-08-20 05:14:13]

nice, great progress! lgtm

[hashimoto, 2014-08-20 06:35:43]

The CQ bit was checked by hashimoto@chromium.org

[commit-bot: I haz the power, 2014-08-20 06:36:56]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/hashimoto@chromium.org/479933003/40001

[commit-bot: I haz the power, 2014-08-20 07:36:48]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  chromium_presubmit on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

[commit-bot: I haz the power, 2014-08-20 07:41:04]

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

[commit-bot: I haz the power, 2014-08-20 07:41:06]

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

[hashimoto, 2014-08-20 07:43:03]

TBRing sky@chromium.org for include fix under chrome/browser

[hashimoto, 2014-08-20 07:43:09]

The CQ bit was checked by hashimoto@chromium.org

[commit-bot: I haz the power, 2014-08-20 07:43:18]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/hashimoto@chromium.org/479933003/40001

[commit-bot: I haz the power, 2014-08-20 07:48:46]

Committed patchset #3 (40001) as 290786