GTTF: instantiate ThreadChecker early in the test launcher

base/test/test_launcher.cc

Index: base/test/test_launcher.cc
diff --git a/base/test/test_launcher.cc b/base/test/test_launcher.cc
index 70663be26824cfb721ed9b04cb9ffe03a7b6e990..053bdbf8b5c8833a0c7406d3168b132e1d6c0377 100644
--- a/base/test/test_launcher.cc
+++ b/base/test/test_launcher.cc
@@ -219,6 +219,8 @@ class ResultsPrinter {
   void PrintTestsByStatus(TestResult::Status status,
                           const std::string& description);
 
+  ThreadChecker thread_checker_;
+
   // Test results grouped by test case name.
   typedef std::map<std::string, std::vector<TestResult> > ResultsMap;
   ResultsMap results_;
@@ -237,8 +239,6 @@ class ResultsPrinter {
 
   RunTestsCallback callback_;
 
-  ThreadChecker thread_checker_;
-
   WeakPtrFactory<ResultsPrinter> weak_ptr_;
 
   DISALLOW_COPY_AND_ASSIGN(ResultsPrinter);