Use more unique names for blink core TestCase classes

It is fairly common to have a help struct with test data and a fair
portion of the code call that struct TestCase and put it in a fairly
global namespace. In jumbo builds those structs will collide so this
patch renames them to more specific names such as
MediaQuerySetTestCase or SizesCalcTestCase.

R=fs@opera.com

Change-Id: Ic02ef5062782a0ec3862ad3bffdc462574ca8a61
Reviewed-on: https://chromium-review.googlesource.com/574600
Reviewed-by: Fredrik Söderquist <fs@opera.com>
Commit-Queue: Daniel Bratell <bratell@opera.com>
Cr-Commit-Position: refs/heads/master@{#487114}
8 files changed