aura: Fix views_unittests on linux.

aura: Fix views_unittests and aura_unittests on linux.

. Use NativeScrollBarViews in aura and wayland.
. Disable clipboard-related tests in TextfieldViewsModelTest until aura on linux
  has clipboard support.
. Use osmesa implementation for aura_unittests.

TBR=evan@chromium.org
BUG=97845, 99128
TEST=views_unittests passes on linux with use_aura

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=104220

[sky, 2011-10-05 17:05:18]

LGTM

[sadrul, 2011-10-05 18:16:13]

I had to mark a few more tests as DISABLED_, and changed from FAILS_ to
DISABLED_ for a few more tests (since at least a few of them actually cause a
crash).

[sky, 2011-10-05 20:28:03]

http://codereview.chromium.org/8143021/diff/2002/views/controls/textfield/nat...
File views/controls/textfield/native_textfield_views_unittest.cc (right):

http://codereview.chromium.org/8143021/diff/2002/views/controls/textfield/nat...
views/controls/textfield/native_textfield_views_unittest.cc:39: #define
MAYBE_KeyTest DISABLED_KeyTest
These don't crash on windows (as far as I know). Could you mark them DISABLED on
only linux?

[sadrul, 2011-10-05 20:42:35]

I also included a compile fix for layer_unittests

http://codereview.chromium.org/8143021/diff/2002/views/controls/textfield/nat...
File views/controls/textfield/native_textfield_views_unittest.cc (right):

http://codereview.chromium.org/8143021/diff/2002/views/controls/textfield/nat...
views/controls/textfield/native_textfield_views_unittest.cc:39: #define
MAYBE_KeyTest DISABLED_KeyTest
On 2011/10/05 20:28:03, sky wrote:
> These don't crash on windows (as far as I know). Could you mark them DISABLED
on
> only linux?

It turns out just the drag-n-drop related tests crash on linux. So I have marked
just those disabled on linux.

[sky, 2011-10-05 22:02:07]

SLGTM

[sadrul, 2011-10-06 01:22:44]

I removed the changes from native_textfield_views_unittest.cc from this CL in
favour of http://codereview.chromium.org/8150001/. Landing the rest.