Revert of Use src-side launcher for telemetry_unittests in chromium_trybot recipe

scripts/slave/recipe_modules/chromium/steps.py

Index: scripts/slave/recipe_modules/chromium/steps.py
diff --git a/scripts/slave/recipe_modules/chromium/steps.py b/scripts/slave/recipe_modules/chromium/steps.py
index f7ea3f5cdd74ded59f0652324b9fc43f06058138..5a5fa86c9ef7f439928c9bbf8e8082c541537a09 100644
--- a/scripts/slave/recipe_modules/chromium/steps.py
+++ b/scripts/slave/recipe_modules/chromium/steps.py
@@ -98,29 +98,19 @@
   All new tests are strongly encouraged to use this infrastructure.
   """
 
-  def __init__(self, name, script, all_compile_targets):
+  def __init__(self, name, script):
     super(ScriptTest, self).__init__()
     self._name = name
     self._script = script
-    self._all_compile_targets = all_compile_targets
 
   @property
   def name(self):
     return self._name
 
-  def compile_targets(self, api):
-    try:
-      return self._all_compile_targets[self._script]
-    except KeyError:
-      # Not all scripts will have test data inside recipes,
-      # so return a default value.
-      # TODO(phajdan.jr): Revisit this when all script tests
-      # lists move src-side. We should be able to provide
-      # test data then.
-      if api.chromium._test_data.enabled:
-        return []
-
-      raise
+  @staticmethod
+  def compile_targets(_):
+    # TODO(phajdan.jr): Implement this (http://crbug.com/422235).
+    return []
 
   def run(self, api, suffix):
     name = self.name
@@ -133,8 +123,7 @@
           # for consistency.
           api.path['checkout'].join(
               'testing', 'scripts', api.path.basename(self._script)),
-          args=(api.chromium.get_common_args_for_scripts() +
-                ['run', '--output', api.json.output()]),
+          args=['run', '--output', api.json.output()],
           step_test_data=lambda: api.json.test_api.output(
               {'valid': True, 'failures': []}))
     finally: