tryserver recipe_module: Add get_tags.

recipe_modules/git_cl/example.py

Index: recipe_modules/git_cl/example.py
diff --git a/recipe_modules/git_cl/example.py b/recipe_modules/git_cl/example.py
index cf1f002f081aee31870c35cf7a9deb8a3a5ff1ba..c76eac9541c9525b4cb6b4bbc957411663323245 100644
--- a/recipe_modules/git_cl/example.py
+++ b/recipe_modules/git_cl/example.py
@@ -14,16 +14,18 @@ DEPS = [
 
 
 def RunSteps(api):
-  res = api.git_cl.get_description(cwd=api.path.mkdtemp('fakee'))
-  # Look ma, no hands! (Can pass in the cwd without configuring git_cl).
-  api.step('echo', ['echo', res.stdout])
+  result = api.git_cl.get_description(
+      patch='https://code.review/123', codereview='rietveld', suffix='build')
+  api.git_cl.set_description(
+      'bammmm', patch='https://code.review/123', codereview='rietveld')
+  api.step('echo', ['echo', result.stdout])
 
   api.git_cl.set_config('basic')
   api.git_cl.c.repo_location = api.path.mkdtemp('fakerepo')
 
   api.step('echo', ['echo', api.git_cl.get_description().stdout])
 
-  api.git_cl.set_description("new description woo")
+  api.git_cl.set_description('new description woo')
 
   api.step('echo', ['echo', api.git_cl.get_description().stdout])
 
@@ -31,11 +33,11 @@ def GenTests(api):
   yield (
       api.test('basic') +
       api.override_step_data(
-          'git_cl description', stdout=api.raw_io.output('hi')) +
+          'git_cl description (build)', stdout=api.raw_io.output('hi')) +
       api.override_step_data(
-          'git_cl description (2)', stdout=api.raw_io.output('hey')) +
+          'git_cl description', stdout=api.raw_io.output('hey')) +
       api.override_step_data(
-          'git_cl description (3)', stdout=api.raw_io.output(
+          'git_cl description (2)', stdout=api.raw_io.output(
               'new description woo'))
   )