Refactor the way that TestApi works so that it is actually useful.

scripts/slave/recipe_modules/python/api.py

 # Copyright 2013 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.
 
 from slave import recipe_api
+from slave import recipe_util
 
 import textwrap
 
 class PythonApi(recipe_api.RecipeApi):
   def __call__(self, name, script, args=None, unbuffered=True, **kwargs):
     """Return a step to run a python script with arguments."""
     cmd = ['python']
     if unbuffered:
       cmd.append('-u')
     cmd.append(script)
     return self.m.step(name, cmd + list(args or []), **kwargs)
 
   def inline(self, name, program, **kwargs):
     """Run an inline python program as a step.
 
     Program is output to a temp file and run when this step executes.
     """
     program = textwrap.dedent(program)
     compile(program, '<string>', 'exec', dont_inherit=1)
 
-    @recipe_api.wrap_followup(kwargs)
+    @recipe_util.wrap_followup(kwargs)
     def inline_followup(step_result):
       step_result.presentation.logs['python.inline'] = program.splitlines()
 
-    return self(name, recipe_api.InputDataPlaceholder(program, '.py'),
+    return self(name, self.m.raw_io.input(program, '.py'),
                 followup_fn=inline_followup, **kwargs)