Revert of "Split the invisible-descendants-should-not-affect-opt-in test up.". (https://codereview.chromium.org/232043002)

Reason for revert:
[blink gardening] The following tests failed.
- compositing/overflow/nodisplay-descendants-should-not-affect-opt-in.html
- compositing/overflow/invisible-descendants-should-not-affect-opt-in.html

Dashboard:
- http://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=compositing%2Foverflow%2Finvisible-descendants-should-not-affect-opt-in.html
- http://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=virtual%2Fgpu%2Fcompositedscrolling%2Foverflow%2Fnodisplay-descendants-should-not-affect-opt-in.html

Original issue's description:
> Split the invisible-descendants-should-not-affect-opt-in test up.
>> The test does a for loop over 3 cases, checking if composited is enabled
> at all to determine if we've promoted layers. When ForceCompositingMode
> is on, we can not use this test to verify promotion. So split the
> test's 3 cases into separate tests, and each one dumps the layer tree
> so that we can verify promotion/not correctly.
>
> R=vollick@chromium.org, enne@chromium.org
> BUG=361729

TBR=danakj@chromium.org,vollick@chromium.org,enne@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=361729

Review URL: https://codereview.chromium.org/238713002

git-svn-id: svn://svn.chromium.org/blink/trunk@171535 bbb929c8-8fbe-4397-9dbb-9b2b20218538