iOS gtest launcher: retry tests in one big batch

base/test/launcher/test_launcher_ios.cc

Index: base/test/launcher/test_launcher_ios.cc
diff --git a/base/test/launcher/test_launcher_ios.cc b/base/test/launcher/test_launcher_ios.cc
index 7028133b5247a27900658b409219219404ae2605..ecd31aedf5d00cb3754b0c1d4220b65e1dce3e51 100644
--- a/base/test/launcher/test_launcher_ios.cc
+++ b/base/test/launcher/test_launcher_ios.cc
@@ -129,6 +129,14 @@ class IOSUnitTestPlatformDelegate : public base::UnitTestPlatformDelegate {
     return dir_exe_.AppendASCII("iossim").value();
   }
 
+  void RelaunchTests(base::TestLauncher* test_launcher,
+                     const std::vector<std::string>& test_names,
+                     int launch_flags) override {
+    // Relaunch all tests in one big batch, since overhead of smaller batches
+    // is too big for serialized runs inside ios simulator.
+    RunUnitTestsBatch(test_launcher, this, test_names, launch_flags);

[smut, 2015/01/28 19:36:25]

This is about what we have implemented downstream in our Python scripts. However
if one of the retried tests crashes the entire suite, there won't be any retries
for the tests that come after it.

+  }
+
  private:
   // Directory containing test launcher's executable.
   base::FilePath dir_exe_;