Adds function for activating a tab.

tools/telemetry/telemetry/run_tests.py

Index: tools/telemetry/telemetry/run_tests.py
diff --git a/tools/telemetry/telemetry/run_tests.py b/tools/telemetry/telemetry/run_tests.py
index c1f4eb751c2ee7b6a0c8ac8f61fdb86a804e75cf..94901aedf276e41f680b6e2cda9a4e670fbfb116 100644
--- a/tools/telemetry/telemetry/run_tests.py
+++ b/tools/telemetry/telemetry/run_tests.py
@@ -104,7 +104,7 @@ def DiscoverAndRunTests(dir_name, args, top_level_dir):
   test_result = runner.run(filtered_suite)
   return len(test_result.errors) + len(test_result.failures)
 
-def Main(args, start_dir, top_level_dir):
+def Main(args, start_dir, top_level_dir, extra_options=None):
   """Unit test suite that collects all test cases for telemetry."""
   default_options = browser_options.BrowserOptions()
   default_options.browser_type = 'any'
@@ -113,6 +113,11 @@ def Main(args, start_dir, top_level_dir):
   parser.add_option('--repeat-count', dest='run_test_repeat_count',
                     type='int', default=1,
                     help='Repeats each a provided number of times.')
+  if extra_options:

[nduca, 2012/12/21 22:15:23]

I do not understand this at all. Why do you need this?

[Danh Nguyen, 2012/12/26 19:13:04]

I intended to allow options in gpu validation tests, e.g.:

./gpu_validation/run_test --url_file=../telemetry/examples/top1k --num_tabs=25

Per your comments for https://codereview.chromium.org/11668013/ (unit tests
shouldn't have options), I'm going to remove this change.

+    for option in extra_options:
+      parser.add_option(option['name'], dest=option['dest'],
+                        type=option['type'], default=option['default'],
+                        help=option['help'])
 
   _, args = parser.parse_args(args)