Disable GpuFeatureTest.MultisamplingAllowed on the official bots

This test is broken because it doesn't take into account that this
feature may be disabled by the blacklist (it is disabled pre-10.8.3 on
basically all vendors). It's only not failing on the main waterfall
because those bots have all features disabled, which the test does
actually handle.

TBR=zmo@chromium.org
BUG=314745
NOTRY=True

Review URL: https://codereview.chromium.org/164983004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251398 0039d316-1c4b-4281-b951-d872f2087c98
InputDeviceSettings refactoring.

Standalone functions replaced with InputDeviceSettings interface and
singleton implementation InputDeviceSettingsImpl.
Changing of input device settings became more efficient for two reasons:
1) InputDeviceSettingsImpl caches previously set values and doesn't
call tpcontrol/mousecontrol if client tries to set same values twice.
2) New methods for changing several settings at a time was implemented. For
example, If client wants to change several touchpad settings at a time,
he can use UpdateTouchpadSettings method that will result in one (or
zero) invocation of tpcontrol.

Implemented FakeInputDeviceSettings for use in tests.

These changes are needed for upcoming changes in chromeos::Preferences.

BUG=325564
TEST=manually
TBR=scheib

Review URL: https://codereview.chromium.org/147133003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251399 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 251399