iOS gtest launcher: retry tests in one big batch

base/test/launcher/test_launcher_ios.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/test/launcher/test_launcher.h"
 
 #include "base/at_exit.h"
 #include "base/base_paths.h"
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 111 matching lines @@
     cmd_line.AppendSwitchPath(switches::kTestLauncherOutput, output_file);
     cmd_line.AppendSwitchASCII(base::kGTestFilterFlag,
                                JoinString(test_names, ":"));
     return cmd_line;
   }
 
   std::string GetWrapperForChildGTestProcess() override {
     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);
+  }
+
  private:
   // Directory containing test launcher's executable.
   base::FilePath dir_exe_;
 
   // Name of the test executable to run.
   std::string test_name_;
 
   // Path that launched test binary can write to.
   base::FilePath writable_path_;
 
@@ skipping 28 matching lines @@
   // Force one job since we can't run multiple simulators in parallel.
   base::TestLauncher launcher(&delegate, 1);
   bool success = launcher.Run();
 
   fprintf(stdout, "Tests took %" PRId64 " seconds.\n",
           (base::TimeTicks::Now() - start_time).InSeconds());
   fflush(stdout);
 
   return (success ? 0 : 1);
 }