re-apply r34183...

re-apply r34183

---------------
linux: theme scrollbars from GTK theme 

Pick the color of the slider's thumbpart and rail from the GTK theme. 
We cannot match the exact visual appearance of the GTK theme, as 
rendering engines can make arbitrary changes to the actual visual 
appearance. But by sampling a representative set of pixels, we ensure 
that we will at least match the general color scheme. 

BUG=10949
patch by <markus [at] chromium>
original review: http://codereview.chromium.org/400027/show


Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=34285

[Evan Stade, 2009-12-09 23:12:18]

TEST=trybots

[asargent_no_longer_on_chrome, 2009-12-09 23:44:55]

Do you want me to do a code review or is this just an FYI that you're
reattempting the patch which passes trybots?

[Evan Stade, 2009-12-09 23:54:22]

the latter (the fix is in
chrome/browser/views/notifications/balloon_view_host.h)

[Evan Stade, 2009-12-09 23:55:01]

note the win try bot result for the 2nd patch is:
http://build.chromium.org/buildbot/try-server/buildstatus?builder=win&number=...

[asargent_no_longer_on_chrome, 2009-12-10 00:00:51]

Ok, rubber stamp lgtm.