[chromedriver] Add some simple perf benchmarks.

chrome/test/chromedriver/run_all_tests.py

Index: chrome/test/chromedriver/run_all_tests.py
diff --git a/chrome/test/chromedriver/run_all_tests.py b/chrome/test/chromedriver/run_all_tests.py
index 50e3870fe78c478421e19f29915d865fd2d82031..5cbf7e489e2f26824eff394923b9499b02a975df 100755
--- a/chrome/test/chromedriver/run_all_tests.py
+++ b/chrome/test/chromedriver/run_all_tests.py
@@ -34,13 +34,19 @@ def _AddToolsToSystemPathForWindows():
   os.environ['PATH'] = os.pathsep.join(paths) + os.pathsep + os.environ['PATH']
 
 
-def _GenerateTestCommand(script, chromedriver, chrome=None,
-                         chrome_version=None, android_package=None):
+def _GenerateTestCommand(script,
+                         chromedriver,
+                         ref_chromedriver=None,
+                         chrome=None,
+                         chrome_version=None,
+                         android_package=None):
   cmd = [
       sys.executable,
       os.path.join(_THIS_DIR, script),
       '--chromedriver=' + chromedriver,
   ]
+  if ref_chromedriver:
+    cmd.append('--reference-chromedriver=' + ref_chromedriver)
   if chrome:
     cmd.append('--chrome=' + chrome)
   if chrome_version:
@@ -51,15 +57,20 @@ def _GenerateTestCommand(script, chromedriver, chrome=None,
   return cmd
 
 
-def RunPythonTests(chromedriver, chrome=None, chrome_version=None,
+def RunPythonTests(chromedriver, ref_chromedriver,
+                   chrome=None, chrome_version=None,
                    chrome_version_name=None, android_package=None):
   version_info = ''
   if chrome_version_name:
     version_info = '(v%s)' % chrome_version_name
   util.MarkBuildStepStart('python_tests%s' % version_info)
   code = util.RunCommand(
-      _GenerateTestCommand('run_py_tests.py', chromedriver, chrome,
-                           chrome_version, android_package))
+      _GenerateTestCommand('run_py_tests.py',
+                           chromedriver,
+                           ref_chromedriver=ref_chromedriver,
+                           chrome=chrome,
+                           chrome_version=chrome_version,
+                           android_package=android_package))
   if code:
     util.MarkBuildStepError()
   return code
@@ -72,8 +83,12 @@ def RunJavaTests(chromedriver, chrome=None, chrome_version=None,
     version_info = '(v%s)' % chrome_version_name
   util.MarkBuildStepStart('java_tests%s' % version_info)
   code = util.RunCommand(
-      _GenerateTestCommand('run_java_tests.py', chromedriver, chrome,
-                           chrome_version, android_package))
+      _GenerateTestCommand('run_java_tests.py',
+                           chromedriver,
+                           ref_chromedriver=None,
+                           chrome=chrome,
+                           chrome_version=chrome_version,
+                           android_package=android_package))
   if code:
     util.MarkBuildStepError()
   return code
@@ -100,11 +115,11 @@ def main():
            'Notice: this option only applies to desktop.')
   options, _ = parser.parse_args()
 
-  postfix = ''
+  exe_postfix = ''
   if util.IsWindows():
-    postfix = '.exe'
-  cpp_tests_name = 'chromedriver2_tests' + postfix
-  server_name = 'chromedriver2_server' + postfix
+    exe_postfix = '.exe'
+  cpp_tests_name = 'chromedriver2_tests' + exe_postfix
+  server_name = 'chromedriver2_server' + exe_postfix
 
   required_build_outputs = [server_name]
   if not options.android_package:
@@ -112,7 +127,12 @@ def main():
   build_dir = chrome_paths.GetBuildDir(required_build_outputs)
   print 'Using build outputs from', build_dir
 
-  chromedriver_server = os.path.join(build_dir, server_name)
+  chromedriver = os.path.join(build_dir, server_name)
+  ref_chromedriver = os.path.join(
+      chrome_paths.GetSrc(),
+      'chrome', 'test', 'chromedriver', 'third_party', 'java_tests',
+      'reference_builds',
+      'chromedriver_%s%s' % (util.GetPlatformName(), exe_postfix))
 
   if util.IsLinux():
     # Set LD_LIBRARY_PATH to enable successful loading of shared object files,
@@ -124,9 +144,10 @@ def main():
 
   if options.android_package:
     os.environ['PATH'] += os.pathsep + os.path.join(_THIS_DIR, 'chrome')
-    code1 = RunPythonTests(chromedriver_server,
+    code1 = RunPythonTests(chromedriver,
+                           ref_chromedriver,
                            android_package=options.android_package)
-    code2 = RunJavaTests(chromedriver_server,
+    code2 = RunJavaTests(chromedriver,
                          android_package=options.android_package)
     return code1 or code2
   else:
@@ -148,10 +169,12 @@ def main():
       chrome_path = archive.DownloadChrome(version[1],
                                            util.MakeTempDir(),
                                            download_site)
-      code1 = RunPythonTests(chromedriver_server, chrome=chrome_path,
+      code1 = RunPythonTests(chromedriver,
+                             ref_chromedriver,
+                             chrome=chrome_path,
                              chrome_version=version[0],
                              chrome_version_name=version_name)
-      code2 = RunJavaTests(chromedriver_server, chrome=chrome_path,
+      code2 = RunJavaTests(chromedriver, chrome=chrome_path,
                            chrome_version=version[0],
                            chrome_version_name=version_name)
       code = code or code1 or code2