Revert 223397 "Enable GPU blacklist in tests."

Revert 223397 "Enable GPU blacklist in tests."

> Enable GPU blacklist in tests.
> 
> Partial re-land of https://codereview.chromium.org/22198004/) -- Always enable FCM on Windows -- Part 1/3.
> 
> On top of fixing some of the issues there; only lands the part that enables the GPU blacklist in tests as the former CL is too hard to land all at once.
> 
> Also keeping --skip-gpu-data-loading around for now to be able to deal with failures caused in layout_tests by this on their own later (this needs to land ASAP and layout_tests don't need this ASAP).
> 
> Another CL will follow to always enable FCM on non-blacklisted Windows machines.
> 
> This part re-enables loading the blacklist in tests (and adds a content_browsertest to make sure that the configuration we expect to be testing is indeed the one we are testing -- this uncertainty is basically the only reason the blacklist was explicitly disabled before).
> 
> This CL also cleans up compositor_util.cc which was enforcing the blacklist twice.
> 
> The original plan was to do this only for Windows as Mac/Linux was causing trouble, but it turns out to be harder to do it only on Windows; so taking care of http://crbug.com/277242 in this CL too after all... 
> 
> BUG=233830, 267038, 190942, 277242
> TBR=jcivelli, piman 
> 
> Originally Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=219132 
> Then Reverted: https://src.chromium.org/viewvc/chrome?view=rev&revision=219159
> 
> Then re-committed (part 1/3): https://src.chromium.org/viewvc/chrome?view=rev&revision=221114
> Reverted in: https://src.chromium.org/viewvc/chrome?view=rev&revision=221145
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=222105
> 
> Review URL: https://chromiumcodereview.appspot.com/23534006

TBR=gab@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=223456

[nasko, 2013-09-16 23:03:30]

Committed patchset #1 manually as r223456.