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=bsazonov@chromium.org

Bug: 1023677
Change-Id: Id4f3e848e4d7dd6e30fad14238fcfa0313a29b7b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1957497
Auto-Submit: Ilia Samsonov <isamsonov@google.com>
Reviewed-by: Boris Sazonov <bsazonov@chromium.org>
Commit-Queue: Ilia Samsonov <isamsonov@google.com>
Cr-Commit-Position: refs/heads/master@{#726541}

chrome/browser/signin/process_dice_header_delegate_impl_unittest.cc

@@ -154,7 +154,7 @@ TEST_P(ProcessDiceHeaderDelegateImplTestEnableSync, EnableSync) {
   EXPECT_FALSE(show_error_called_);
 }
 
-INSTANTIATE_TEST_SUITE_P(/* no prefix */,
+INSTANTIATE_TEST_SUITE_P(All,
                          ProcessDiceHeaderDelegateImplTestEnableSync,
                          ::testing::ValuesIn(kEnableSyncTestCases));
 
@@ -195,7 +195,7 @@ TEST_P(ProcessDiceHeaderDelegateImplTestHandleTokenExchangeFailure,
 }
 
 INSTANTIATE_TEST_SUITE_P(
-    /* no prefix */,
+    All,
     ProcessDiceHeaderDelegateImplTestHandleTokenExchangeFailure,
     ::testing::ValuesIn(kHandleTokenExchangeFailureTestCases));