iOS gtest launcher: retry tests in one big batch

base/test/launcher/unit_test_launcher.h

Index: base/test/launcher/unit_test_launcher.h
diff --git a/base/test/launcher/unit_test_launcher.h b/base/test/launcher/unit_test_launcher.h
index 5b5f2402740b083c72996ed39ae7cd5101edaf3f..ca00f1048b2d18dd8566640a3d68d56ec3f70520 100644
--- a/base/test/launcher/unit_test_launcher.h
+++ b/base/test/launcher/unit_test_launcher.h
@@ -55,6 +55,11 @@ class UnitTestPlatformDelegate {
   // no wrapper.
   virtual std::string GetWrapperForChildGTestProcess() = 0;
 
+  // Relaunch tests, e.g. after a crash.
+  virtual void RelaunchTests(TestLauncher* test_launcher,
+                             const std::vector<std::string>& test_names,
+                             int launch_flags) = 0;
+
  protected:
   ~UnitTestPlatformDelegate() {}
 };