ResultDB wrapping for CQ/CI builds.

Add ('rdb', 'stream', '--') to wrapper.
Uses -- to send args to subprocess. (This was the bug with original CL)

Note - to test this, we will have to push changes and revert
immediately if we notice any breakage.

Recipe-Nontrivial-Roll: build
Change-Id: Ibe46314c2f791a99c0e670ff6cc44f6f24fb9f70
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2342254
Reviewed-by: Edward Lesmes <ehmaldonado@chromium.org>
Reviewed-by: Erik Staab <estaab@chromium.org>
Commit-Queue: Saagar Sanghavi <saagarsanghavi@google.com>

recipes/README.recipes.md

@@ -743,7 +743,7 @@ Raises:
 — **def [initialize](/recipes/recipe_modules/osx_sdk/api.py#46)(self):**
 ### *recipe_modules* / [presubmit](/recipes/recipe_modules/presubmit)
 
-[DEPS](/recipes/recipe_modules/presubmit/__init__.py#11): [bot\_update](#recipe_modules-bot_update), [depot\_tools](#recipe_modules-depot_tools), [gclient](#recipe_modules-gclient), [git](#recipe_modules-git), [tryserver](#recipe_modules-tryserver), [recipe\_engine/context][recipe_engine/recipe_modules/context], [recipe\_engine/cq][recipe_engine/recipe_modules/cq], [recipe\_engine/json][recipe_engine/recipe_modules/json], [recipe\_engine/path][recipe_engine/recipe_modules/path], [recipe\_engine/properties][recipe_engine/recipe_modules/properties], [recipe\_engine/python][recipe_engine/recipe_modules/python], [recipe\_engine/step][recipe_engine/recipe_modules/step]
+[DEPS](/recipes/recipe_modules/presubmit/__init__.py#11): [bot\_update](#recipe_modules-bot_update), [depot\_tools](#recipe_modules-depot_tools), [gclient](#recipe_modules-gclient), [git](#recipe_modules-git), [tryserver](#recipe_modules-tryserver), [recipe\_engine/context][recipe_engine/recipe_modules/context], [recipe\_engine/cq][recipe_engine/recipe_modules/cq], [recipe\_engine/json][recipe_engine/recipe_modules/json], [recipe\_engine/path][recipe_engine/recipe_modules/path], [recipe\_engine/properties][recipe_engine/recipe_modules/properties], [recipe\_engine/python][recipe_engine/recipe_modules/python], [recipe\_engine/resultdb][recipe_engine/recipe_modules/resultdb], [recipe\_engine/step][recipe_engine/recipe_modules/step]
 
 #### **class [PresubmitApi](/recipes/recipe_modules/presubmit/api.py#16)([RecipeApi][recipe_engine/wkt/RecipeApi]):**
 
@@ -751,7 +751,7 @@ Raises:
 
 Return a presubmit step.
 
-— **def [execute](/recipes/recipe_modules/presubmit/api.py#77)(self, bot_update_step, skip_owners=False):**
+— **def [execute](/recipes/recipe_modules/presubmit/api.py#79)(self, bot_update_step, skip_owners=False):**
 
 Runs presubmit and sets summary markdown if applicable.
 
@@ -761,7 +761,7 @@ Args:
 Returns:
   a RawResult object, suitable for being returned from RunSteps.
 
-— **def [prepare](/recipes/recipe_modules/presubmit/api.py#41)(self):**
+— **def [prepare](/recipes/recipe_modules/presubmit/api.py#43)(self):**
 
 Set up a presubmit run.
 
@@ -1075,6 +1075,7 @@ Move things around in a loop!
 [recipe_engine/recipe_modules/properties]: https://chromium.googlesource.com/infra/luci/recipes-py.git/+/5d50d5f744305222468fed128a8b369ce873ce19/README.recipes.md#recipe_modules-properties
 [recipe_engine/recipe_modules/python]: https://chromium.googlesource.com/infra/luci/recipes-py.git/+/5d50d5f744305222468fed128a8b369ce873ce19/README.recipes.md#recipe_modules-python
 [recipe_engine/recipe_modules/raw_io]: https://chromium.googlesource.com/infra/luci/recipes-py.git/+/5d50d5f744305222468fed128a8b369ce873ce19/README.recipes.md#recipe_modules-raw_io
+[recipe_engine/recipe_modules/resultdb]: https://chromium.googlesource.com/infra/luci/recipes-py.git/+/5d50d5f744305222468fed128a8b369ce873ce19/README.recipes.md#recipe_modules-resultdb
 [recipe_engine/recipe_modules/runtime]: https://chromium.googlesource.com/infra/luci/recipes-py.git/+/5d50d5f744305222468fed128a8b369ce873ce19/README.recipes.md#recipe_modules-runtime
 [recipe_engine/recipe_modules/step]: https://chromium.googlesource.com/infra/luci/recipes-py.git/+/5d50d5f744305222468fed128a8b369ce873ce19/README.recipes.md#recipe_modules-step
 [recipe_engine/recipe_modules/url]: https://chromium.googlesource.com/infra/luci/recipes-py.git/+/5d50d5f744305222468fed128a8b369ce873ce19/README.recipes.md#recipe_modules-url

recipes/recipe_modules/presubmit/__init__.py

@@ -20,6 +20,7 @@ DEPS = [
   'recipe_engine/properties',
   'recipe_engine/python',
   'recipe_engine/step',
+  'recipe_engine/resultdb',
   'tryserver',
 ]
 

recipes/recipe_modules/presubmit/api.py

@@ -34,6 +34,8 @@ class PresubmitApi(recipe_api.RecipeApi):
       presubmit_args = list(args) + [
           '--json_output', self.m.json.output(),
       ]
+      if self.m.resultdb.enabled:
+        kwargs['wrapper'] = ('rdb', 'stream', '--')
       step_data = self.m.python(
           name, self.presubmit_support_path, presubmit_args, **kwargs)
       return step_data.json.output