Support proper retrying of telemetry_unittests in recipes

scripts/slave/recipe_modules/chromium/api.py

Index: scripts/slave/recipe_modules/chromium/api.py
diff --git a/scripts/slave/recipe_modules/chromium/api.py b/scripts/slave/recipe_modules/chromium/api.py
index b31f396ac69fcce2accfd09827c209356bad1f6d..a3f34741a2c44cca25fc28e59acde269093290a3 100644
--- a/scripts/slave/recipe_modules/chromium/api.py
+++ b/scripts/slave/recipe_modules/chromium/api.py
@@ -299,13 +299,14 @@ class ChromiumApi(recipe_api.RecipeApi):
         env=env,
         **kwargs)
 
-  def run_telemetry_unittests(self, suffix=None, **kwargs):
+  def run_telemetry_unittests(self, suffix=None, cmd_args=None, **kwargs):
     name = 'telemetry_unittests'
     if suffix:
       name += ' (%s)' % suffix
+    cmd_args = cmd_args or []
     return self.runtest(
         self.m.path['checkout'].join('tools', 'telemetry', 'run_tests'),
-        args=['--browser=%s' % self.c.build_config_fs.lower()],
+        args=['--browser=%s' % self.c.build_config_fs.lower()] + cmd_args,
         annotate='gtest',
         name=name,
         test_type='telemetry_unittests',
@@ -313,13 +314,14 @@ class ChromiumApi(recipe_api.RecipeApi):
         xvfb=True,
         **kwargs)
 
-  def run_telemetry_perf_unittests(self, suffix=None, **kwargs):
+  def run_telemetry_perf_unittests(self, suffix=None, cmd_args=None, **kwargs):
     name = 'telemetry_perf_unittests'
     if suffix:
       name += ' (%s)' % suffix
+    cmd_args = cmd_args or []
     return self.runtest(
         self.m.path['checkout'].join('tools', 'perf', 'run_tests'),
-        args=['--browser=%s' % self.c.build_config_fs.lower()],
+        args=['--browser=%s' % self.c.build_config_fs.lower()] + cmd_args,
         annotate='gtest',
         name=name,
         test_type='telemetry_perf_unittests',