Update from https://crrev.com/306655

base/test/test_switches.cc

Index: base/test/test_switches.cc
diff --git a/base/test/test_switches.cc b/base/test/test_switches.cc
index c970fd22365da1ba1849cd2d8c51753cfa104be1..4d8331dcffab19a4dbf14a5636abf638a03b07dc 100644
--- a/base/test/test_switches.cc
+++ b/base/test/test_switches.cc
@@ -24,6 +24,9 @@ const char switches::kTestLauncherFilterFile[] = "test-launcher-filter-file";
 // Number of parallel test launcher jobs.
 const char switches::kTestLauncherJobs[] = "test-launcher-jobs";
 
+// Path to list of compiled in tests.
+const char switches::kTestLauncherListTests[] = "test-launcher-list-tests";
+
 // Path to test results file in our custom test launcher format.
 const char switches::kTestLauncherOutput[] = "test-launcher-output";