Refresh appearance of omnibox results when native theme changes.

Refresh appearance of omnibox results when native theme changes.

Previous to this patch, the render texts were created just once.
In some cases that was before the view was actually added to a widget
hierarchy and therefore GetNativeTheme returned the wrong thing. This
only affects GTK theme mode because on all other platforms, there's only
ever one NativeTheme. (Incognito does use a different NativeTheme as
well but this only affected suggestions which we don't provide in
incognito.)

BUG=672226
Review-Url: https://codereview.chromium.org/2578443002
Cr-Commit-Position: refs/heads/master@{#438418}
(cherry picked from commit cfd026f99e1868040b970891ba75d9394c5b8efa)

Committed: https://chromium.googlesource.com/chromium/src/+/9d6ad781e3ec3ec65eb7c656ef10f18d80ed9b0b

[Evan Stade, 2016-12-15 03:14:47]

Description was changed from

==========
Refresh appearance of omnibox results when native theme changes.

Previous to this patch, the render texts were created just once.
In some cases that was before the view was actually added to a widget
hierarchy and therefore GetNativeTheme returned the wrong thing. This
only affects GTK theme mode because on all other platforms, there's only
ever one NativeTheme. (Incognito does use a different NativeTheme as
well but this only affected suggestions which we don't provide in
incognito.)

BUG=672226

Review-Url: https://codereview.chromium.org/2578443002
Cr-Commit-Position: refs/heads/master@{#438418}
(cherry picked from commit cfd026f99e1868040b970891ba75d9394c5b8efa)
==========

to

==========
Refresh appearance of omnibox results when native theme changes.

Previous to this patch, the render texts were created just once.
In some cases that was before the view was actually added to a widget
hierarchy and therefore GetNativeTheme returned the wrong thing. This
only affects GTK theme mode because on all other platforms, there's only
ever one NativeTheme. (Incognito does use a different NativeTheme as
well but this only affected suggestions which we don't provide in
incognito.)

BUG=672226

Review-Url: https://codereview.chromium.org/2578443002
Cr-Commit-Position: refs/heads/master@{#438418}
(cherry picked from commit cfd026f99e1868040b970891ba75d9394c5b8efa)

Committed:
https://chromium.googlesource.com/chromium/src/+/9d6ad781e3ec3ec65eb7c656ef10...
==========

[Evan Stade, 2016-12-15 03:14:48]

Committed patchset #1 (id:1) manually as
9d6ad781e3ec3ec65eb7c656ef10f18d80ed9b0b.