test: Replace _TEST_CASE_ with _TEST_SUITE_ in /ui/base/webui.

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instead of _TEST_CASE_, so this CL cleans up some of the outdated usage.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.

[email protected]

Bug: 925652
Change-Id: I4c82811ae5b6bb31e2fef4930eb910e93ccb72e0
Reviewed-on: https://chromium-review.googlesource.com/c/1438359
Commit-Queue: Michael Giuffrida <[email protected]>
Reviewed-by: Michael Giuffrida <[email protected]>
Cr-Commit-Position: refs/heads/master@{#626372}
diff --git a/ui/base/webui/i18n_source_stream_unittest.cc b/ui/base/webui/i18n_source_stream_unittest.cc
index 5ef13bc..ff4d5b9 100644
--- a/ui/base/webui/i18n_source_stream_unittest.cc
+++ b/ui/base/webui/i18n_source_stream_unittest.cc
@@ -163,7 +163,7 @@
   TemplateReplacements replacements_;
 };
 
-INSTANTIATE_TEST_CASE_P(
+INSTANTIATE_TEST_SUITE_P(
     I18nSourceStreamTests,
     I18nSourceStreamTest,
     ::testing::Values(