depot_tools: only add mock infra_paths when test data is enabled

recipe_modules/infra_paths/api.py

Index: recipe_modules/infra_paths/api.py
diff --git a/recipe_modules/infra_paths/api.py b/recipe_modules/infra_paths/api.py
index 1b902826f1138bce66defc1c86bc74f91d964835..7fd3e1ccd78d69a4d678e8703dfe17a89e65121b 100644
--- a/recipe_modules/infra_paths/api.py
+++ b/recipe_modules/infra_paths/api.py
@@ -29,9 +29,10 @@ class InfraPathsApi(recipe_api.RecipeApi):
     else:
       self.set_config('buildbot')
 
-    for path in self._test_data.get('exists', []):
-      assert isinstance(path.base, NamedBasePath)
-      self.m.path.mock_add_paths(self[path.base.name].join(*path.pieces))
+    if self._test_data.enabled:
+      for path in self._test_data.get('exists', []):
+        assert isinstance(path.base, NamedBasePath)
+        self.m.path.mock_add_paths(self[path.base.name].join(*path.pieces))
 
   def __getitem__(self, name):
     self._lazy_set_config()