Merge to XFA: Return result of the test runner.

We need to actually return the result of the test runner....

TBR=thestig@chromium.org

Review URL: https://codereview.chromium.org/1413863011 .

(cherry picked from commit d1579c9b92b7f9c1d9e0fac1ecb8e3cb23875fca)

Review URL: https://codereview.chromium.org/1419953009 .
diff --git a/testing/tools/run_javascript_tests.py b/testing/tools/run_javascript_tests.py
index 2f46882..76d2379 100755
--- a/testing/tools/run_javascript_tests.py
+++ b/testing/tools/run_javascript_tests.py
@@ -9,7 +9,7 @@
 
 def main():
   runner = test_runner.TestRunner('javascript')
-  runner.Run()
+  return runner.Run()
 
 if __name__ == '__main__':
   sys.exit(main())