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=bartfab@chromium.org

Bug: 1023677
Change-Id: I945eb1ac77ffaf199afffb799717444515d427af
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1926923
Auto-Submit: Ilia Samsonov <isamsonov@google.com>
Reviewed-by: Mattias Nissler <mnissler@chromium.org>
Commit-Queue: Mattias Nissler <mnissler@chromium.org>
Cr-Commit-Position: refs/heads/master@{#722413}

chrome/browser/chromeos/attestation/machine_certificate_uploader_impl_unittest.cc

@@ -230,7 +230,7 @@ TEST_P(MachineCertificateUploaderTest, DBusFailureRetry) {
                 kEnterpriseMachineKey));
 }
 
-INSTANTIATE_TEST_SUITE_P(,
+INSTANTIATE_TEST_SUITE_P(All,
                          MachineCertificateUploaderTest,
                          testing::Values(false, true));