Enable HTTP loading in Mojo dart content handler

mojo/dart/http_load_test/runner.py

Index: mojo/dart/http_load_test/runner.py
diff --git a/mojo/dart/observatory_tester/runner.py b/mojo/dart/http_load_test/runner.py
similarity index 88%
copy from mojo/dart/observatory_tester/runner.py
copy to mojo/dart/http_load_test/runner.py
index d78ec7d1a0a3bdc8bd273468513c34cf8dfde7c5..35769cff41efaf9ffa63a3076974c5bd9076e75f 100755
--- a/mojo/dart/observatory_tester/runner.py
+++ b/mojo/dart/http_load_test/runner.py
@@ -3,7 +3,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-"""This script runs the Observatory tests in the mojo tree."""
+"""This script runs the Dart content handler http load test in the mojo tree."""
 
 import argparse
 import os
@@ -11,15 +11,14 @@ import subprocess
 import sys
 
 MOJO_SHELL = 'mojo_shell'
-TESTEE = 'mojo:observatory_test'
 
-def main(build_dir, dart_exe, tester_script):
+def main(build_dir, dart_exe, tester_script, tester_dir):
   shell_exe = os.path.join(build_dir, MOJO_SHELL)
   subprocess.check_call([
     dart_exe,
     tester_script,
     shell_exe,
-    TESTEE
+    tester_dir,
   ])
 
 if __name__ == '__main__':
@@ -41,4 +40,4 @@ if __name__ == '__main__':
   args = parser.parse_args()
   tester_dir = os.path.dirname(os.path.realpath(__file__))
   tester_dart_script = os.path.join(tester_dir, 'tester.dart');
-  sys.exit(main(args.build_dir, args.dart_exe, tester_dart_script))
+  sys.exit(main(args.build_dir, args.dart_exe, tester_dart_script, tester_dir))