test: Replace _TEST_CASE_ with _TEST_SUITE_ in /content/renderer/media/stream.

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instead of _TEST_CASE_, so this CL cleans up some of the outdated usage.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=guidou@chromium.org

Bug: 925652
Change-Id: I01ea2b6aea86958b966cf75c5ae93abee02d928a
Reviewed-on: https://chromium-review.googlesource.com/c/1438392
Commit-Queue: Guido Urdaneta <guidou@chromium.org>
Reviewed-by: Guido Urdaneta <guidou@chromium.org>
Cr-Commit-Position: refs/heads/master@{#626393}

content/renderer/media/stream/media_stream_constraints_util_audio_unittest.cc

@@ -2111,11 +2111,11 @@ TEST_P(MediaStreamConstraintsUtilAudioTest, UsedAndUnusedSources) {
   }
 }
 
-INSTANTIATE_TEST_CASE_P(,
-                        MediaStreamConstraintsUtilAudioTest,
-                        testing::Values("",
-                                        blink::kMediaStreamSourceTab,
-                                        blink::kMediaStreamSourceSystem,
-                                        blink::kMediaStreamSourceDesktop));
+INSTANTIATE_TEST_SUITE_P(,
+                         MediaStreamConstraintsUtilAudioTest,
+                         testing::Values("",
+                                         blink::kMediaStreamSourceTab,
+                                         blink::kMediaStreamSourceSystem,
+                                         blink::kMediaStreamSourceDesktop));
 
 }  // namespace content

content/renderer/media/stream/webmediaplayer_ms_unittest.cc

@@ -1463,9 +1463,9 @@ TEST_P(WebMediaPlayerMSTest, PictureInPictureTriggerCallback) {
   EXPECT_CALL(*submitter_ptr_, StopUsingProvider());
 }
 
-INSTANTIATE_TEST_CASE_P(,
-                        WebMediaPlayerMSTest,
-                        ::testing::Combine(::testing::Bool(),
-                                           ::testing::Bool(),
-                                           ::testing::Bool()));
+INSTANTIATE_TEST_SUITE_P(,
+                         WebMediaPlayerMSTest,
+                         ::testing::Combine(::testing::Bool(),
+                                            ::testing::Bool(),
+                                            ::testing::Bool()));
 }  // namespace content