Revert of Linux Aura: get tooltip background color from theme

Revert of Linux Aura: get tooltip background color from theme (https://codereview.chromium.org/258713002/)

Reason for revert:
views_unittest TooltipController test failures
views_unittests views_unittests 4 disabled 10 flaky failed 10 ( 9 secs )
stdio
Capture
CloseOnCaptureLost
DontShowEmptyTooltips
EnableOrDisableTooltips
HideOnExit
ReshowOnClickAfterEnterExit
TooltipHidesOnKeyPressAndStaysHiddenUntilChange
TooltipHidesOnTimeoutAndStaysHiddenUntilChange
TooltipsInMultipleViews
ViewTooltip


TooltipControllerTest.ViewTooltip (run #2):
[ RUN      ] TooltipControllerTest.ViewTooltip
Xlib:  extension "RANDR" missing on display ":9".
Received signal 11 SEGV_MAPERR 000000000000
#0 0x000000a88e4e base::debug::StackTrace::StackTrace()
#1 0x000000a89068 base::debug::(anonymous namespace)::StackDumpSignalHandler()
#2 0x7f9474270cb0 \u003Cunknown>
#3 0x000000736b83 views::NativeWidgetAura::Activate()
#4 0x000000737508 views::NativeWidgetAura::ShowWithWindowState()
#5 0x000000738acb views::Widget::Show()
#6 0x00000052cb09 views::corewm::test::(anonymous namespace)::CreateWidget()
#7 0x00000052d397 views::corewm::test::TooltipControllerTest::SetUp()
#8 0x00000065a16a testing::Test::Run()

Original issue's description:
> Linux Aura: get tooltip background color from theme
> 
> the border color can still conflict with the theme (e.g., no visible border if the tooltip bg is dark), but fixing that is a lot harder because the border, window roundedness, and shadow are all one tiled set of images (see shadow.cc).
> 
> BUG=348194
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=266974

TBR=ben@chromium.org,estade@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=348194
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=266992

[robliao, 2014-04-29 23:12:06]

Created Revert of Linux Aura: get tooltip background color from theme

[commit-bot: I haz the power, 2014-04-29 23:14:06]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/robliao@chromium.org/263533003/1

[commit-bot: I haz the power, 2014-04-29 23:17:12]

Change committed as 266992