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=estark@chromium.org

Bug: 1023677
Change-Id: I727b8a7caa8316441c9f496699db2312b8e988fc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1957551
Auto-Submit: Ilia Samsonov <isamsonov@google.com>
Reviewed-by: Emily Stark <estark@chromium.org>
Commit-Queue: Emily Stark <estark@chromium.org>
Cr-Commit-Position: refs/heads/master@{#723405}

chrome/browser/ui/login/login_handler_browsertest.cc

@@ -240,7 +240,7 @@ class LoginPromptBrowserTest
 };
 
 INSTANTIATE_TEST_SUITE_P(
-    /* no prefix */,
+    All,
     LoginPromptBrowserTest,
     ::testing::Values(SplitAuthCacheByNetworkIsolationKey::kFalse,
                       SplitAuthCacheByNetworkIsolationKey::kTrue));
@@ -644,7 +644,7 @@ class MultiRealmLoginPromptBrowserTest : public LoginPromptBrowserTest {
 };
 
 INSTANTIATE_TEST_SUITE_P(
-    /* no prefix */,
+    All,
     MultiRealmLoginPromptBrowserTest,
     ::testing::Values(SplitAuthCacheByNetworkIsolationKey::kFalse,
                       SplitAuthCacheByNetworkIsolationKey::kTrue));