Register expect_tests in gclient config.

This is in order to use built-in presubit recipe.

R=maruel

Change-Id: I3e50af7dc3a9ad83f0f358285395794ea599a4e8
Reviewed-on: https://chromium-review.googlesource.com/1176650
Reviewed-by: Edward Lesmes <ehmaldonado@chromium.org>
Commit-Queue: Andrii Shyshkalov <tandrii@chromium.org>

recipes/README.recipes.md

@@ -869,7 +869,7 @@ Raises:
 
 [DEPS](/recipes/recipe_modules/gclient/examples/full.py#5): [gclient](#recipe_modules-gclient), [recipe\_engine/context][recipe_engine/recipe_modules/context], [recipe\_engine/path][recipe_engine/recipe_modules/path], [recipe\_engine/properties][recipe_engine/recipe_modules/properties], [recipe\_engine/step][recipe_engine/recipe_modules/step]
 
-— **def [RunSteps](/recipes/recipe_modules/gclient/examples/full.py#48)(api):**
+— **def [RunSteps](/recipes/recipe_modules/gclient/examples/full.py#49)(api):**
 ### *recipes* / [gclient:tests/patch\_project](/recipes/recipe_modules/gclient/tests/patch_project.py)
 
 [DEPS](/recipes/recipe_modules/gclient/tests/patch_project.py#9): [gclient](#recipe_modules-gclient), [recipe\_engine/properties][recipe_engine/recipe_modules/properties]

recipes/recipe_modules/gclient/config.py

@@ -284,6 +284,13 @@ def dart(c):
   soln.deps_file = 'DEPS'
   soln.managed = False
 
+@config_ctx()
+def expect_tests(c):
+  soln = c.solutions.add()
+  soln.name = 'expect_tests'
+  soln.url = 'https://chromium.googlesource.com/infra/testing/expect_tests.git'
+  c.got_revision_mapping['expect_tests'] = 'got_revision'
+
 @config_ctx()
 def infra(c):
   soln = c.solutions.add()

recipes/recipe_modules/gclient/examples/full.py

@@ -22,6 +22,7 @@ TEST_CONFIGS = [
   'custom_tabs_client',
   'dart',
   'disable_syntax_validation',
+  'expect_tests',
   'gerrit_test_cq_normal',
   'gyp',
   'infra',