test: Replace _TEST_CASE_ with _TEST_SUITE_ in /ui/compositor.

Googletest is (at last) converging with industry-standard terminology
[1]. We previously called test suites "test cases", which was rather
confusing for folks coming from any other testing framework.

Chrome now has a googltest version that supports _TEST_SUITE_ macros
instead of _TEST_CASE_, so this CL cleans up some of the outdated usage.

[1] https://github.com/google/googletest/blob/master/googletest/docs/primer.md#beware-of-the-nomenclature

This CL was uploaded by git cl split.

R=smcgruer@chromium.org

Bug: 925652
Change-Id: Ibd9e6d542f0b76ce4c868600c655a41c106262b6
Reviewed-on: https://chromium-review.googlesource.com/c/1438268
Commit-Queue: Stephen McGruer <smcgruer@chromium.org>
Reviewed-by: Stephen McGruer <smcgruer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#626396}

ui/compositor/canvas_painter_unittest.cc

@@ -115,7 +115,7 @@ TEST_P(CanvasPainterTest, PaintPixelCanvasEnabled) {
   CheckPaintedShape(bitmap, shape_bounds, shape_color, device_scale_factor());
 }
 
-INSTANTIATE_TEST_CASE_P(,
-                        CanvasPainterTest,
-                        ::testing::Values(1.f, 1.25f, 1.5f, 1.6f, 2.f, 2.25f));
+INSTANTIATE_TEST_SUITE_P(,
+                         CanvasPainterTest,
+                         ::testing::Values(1.f, 1.25f, 1.5f, 1.6f, 2.f, 2.25f));
 }  // namespace ui