Move chrome_proxy tests from under tools/perf to tools/chrome_proxy/integration_tests.

tools/chrome_proxy/run_tests

 #!/usr/bin/env python
-# Copyright 2013 The Chromium Authors. All rights reserved.
+# 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.
 
 """This script runs unit tests of the code in the perf directory.
 
 This script DOES NOT run benchmarks. run_benchmark does that.
 """
 
 import os
 import sys
 
 sys.path.append(os.path.join(os.path.dirname(__file__), os.pardir, 'telemetry'))
+sys.path.append(os.path.join(os.path.dirname(__file__), os.pardir, 'perf'))
 
 from telemetry.unittest import gtest_output_formatter
 from telemetry.unittest import run_tests
 
 
 if __name__ == '__main__':
   base_dir = os.path.dirname(os.path.realpath(__file__))
   output_formatters = [
       gtest_output_formatter.GTestOutputFormatter(sys.stdout)]
   run_tests.config = run_tests.Config(base_dir, [base_dir], output_formatters)
   sys.exit(run_tests.RunTestsCommand.main())