V8 Buildbot: Correctly set properties of triggered tryjobs.

scripts/slave/recipe_modules/v8/api.py

Index: scripts/slave/recipe_modules/v8/api.py
diff --git a/scripts/slave/recipe_modules/v8/api.py b/scripts/slave/recipe_modules/v8/api.py
index 1775ba98a641aa01bf765741688eaeddb89faae9..051de3cd9c690da6c9e20515f9d1d5b281b32e5c 100644
--- a/scripts/slave/recipe_modules/v8/api.py
+++ b/scripts/slave/recipe_modules/v8/api.py
@@ -1009,13 +1009,20 @@ class V8Api(recipe_api.RecipeApi):
       }
       if self.m.tryserver.is_tryserver:
         properties.update(
+          category=self.m.properties['category'],
           issue=self.m.properties['issue'],
+          master=str(self.m.properties['master']),
           patch_project=str(self.m.properties['patch_project']),
           patch_storage=str(self.m.properties['patch_storage']),
           patchset=str(self.m.properties['patchset']),
+          reason=str(self.m.properties['reason']),
           requester=str(self.m.properties['requester']),
           rietveld=str(self.m.properties['rietveld']),
         )
+
+      # TODO(machenbach): Also set meaningful buildbucket tags of triggering
+      # parent.
+
       swarm_hashes = self.m.isolate.isolated_tests
       if swarm_hashes:
         properties['swarm_hashes'] = swarm_hashes