iOS gtest launcher: make simple unit tests like base_unittests work

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 27909d48ee92fc637635fea4819e722928e8ecf8..544df63c6390e2435b7fa011310451cf884dd901 100644
--- a/base/test/launcher/test_launcher.h
+++ b/base/test/launcher/test_launcher.h
@@ -115,10 +115,6 @@ 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;