Add prefix to empty param tests.

googletest will no longer support empty prefix
for parameterized INSTANTIATE_TEST_SUITE_P.
Adding "All" prefix to existing empty prefix test suites.

This CL was uploaded by git cl split.

R=phoglund@chromium.org

Bug: 1023677
Change-Id: I742a5ba4d7aad3ad9b654c1f1a1179b890cabebe
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1926819
Auto-Submit: Ilia Samsonov <isamsonov@google.com>
Reviewed-by: Patrik Höglund <phoglund@chromium.org>
Commit-Queue: Patrik Höglund <phoglund@chromium.org>
Cr-Commit-Position: refs/heads/master@{#717552}

content/browser/webrtc/webrtc_capture_from_element_browsertest.cc

@@ -156,7 +156,7 @@ IN_PROC_BROWSER_TEST_F(WebRtcCaptureFromElementBrowserTest,
                   kCanvasCaptureColorTestHtmlFile);
 }
 
-INSTANTIATE_TEST_SUITE_P(,
+INSTANTIATE_TEST_SUITE_P(All,
                          WebRtcCaptureFromElementBrowserTest,
                          testing::ValuesIn(kFileAndTypeParameters));
 }  // namespace content