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=lpy@chromium.org

Bug: 1023677
Change-Id: Ib862853982d5623ee977d4ae21104b10937a4f18
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1926827
Auto-Submit: Ilia Samsonov <isamsonov@google.com>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Kentaro Hara <haraken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#721768}

chrome/browser/resource_coordinator/tab_manager_stats_collector_unittest.cc

@@ -469,7 +469,7 @@ TEST_P(TabManagerStatsCollectorParameterizedTest, HistogramsTabCount) {
 }
 
 INSTANTIATE_TEST_SUITE_P(
-    ,
+    All,
     TabManagerStatsCollectorTabSwitchTest,
     ::testing::Values(std::make_pair(false,   // Session restore
                                      false),  // Background tab opening
@@ -477,7 +477,7 @@ INSTANTIATE_TEST_SUITE_P(
                       std::make_pair(false, true),
                       std::make_pair(true, true)));
 INSTANTIATE_TEST_SUITE_P(
-    ,
+    All,
     TabManagerStatsCollectorParameterizedTest,
     ::testing::Values(std::make_pair(false,   // Session restore
                                      false),  // Background tab opening