Factored out duplicate code for formatting full test name

base/test/launcher/test_launcher.h

Index: base/test/launcher/test_launcher.h
diff --git a/base/test/launcher/test_launcher.h b/base/test/launcher/test_launcher.h
index 600c4dec339f3fee2c83c591abd6212891f8490b..d50bf2fb3b52b0bd203457ad0d5616469e3ff0db 100644
--- a/base/test/launcher/test_launcher.h
+++ b/base/test/launcher/test_launcher.h
@@ -99,6 +99,10 @@ class TestLauncher {
   // Called when a test has finished running.
   void OnTestFinished(const TestResult& result);
 
+  // Constructs a full test name given a test case name and a test name.
+  static std::string FormatFullTestName(const std::string& test_case_name,
+                                        const std::string& test_name);
+
  private:
   bool Init() WARN_UNUSED_RESULT;