Allow a single trybot to mirror multiple waterfall bots.

scripts/slave/recipes/findit/chromium/compile.py

Index: scripts/slave/recipes/findit/chromium/compile.py
diff --git a/scripts/slave/recipes/findit/chromium/compile.py b/scripts/slave/recipes/findit/chromium/compile.py
index 69a0e80d4f2b08a086527c600858fbc727954dab..4e9251df7597954f604a1ac2a9a33a57d6933ff4 100644
--- a/scripts/slave/recipes/findit/chromium/compile.py
+++ b/scripts/slave/recipes/findit/chromium/compile.py
@@ -49,11 +49,12 @@ class CompileResult(object):
 def _run_compile_at_revision(api, target_mastername, target_buildername,
                              revision, compile_targets, use_analyze):
   with api.step.nest('test %s' % str(revision)):
+    bot_desc = api.chromium_tests.create_bot_desc(
+        target_mastername, target_buildername)
     # Checkout code at the given revision to recompile.
     bot_update_step, bot_db = \
         api.chromium_tests.prepare_checkout(
-            target_mastername,
-            target_buildername,
+            bot_desc,
             root_solution_revision=revision)
 
     # TODO(http://crbug.com/560991): if compile targets are provided, check
@@ -62,8 +63,7 @@ def _run_compile_at_revision(api, target_mastername, target_buildername,
     compile_targets = sorted(set(compile_targets or []))
     if not compile_targets:
       compile_targets, _ = api.chromium_tests.get_compile_targets_and_tests(
-          target_mastername,
-          target_buildername,
+          bot_desc,
           bot_db,
           override_bot_type='builder_tester')
 
@@ -104,13 +104,14 @@ def _run_compile_at_revision(api, target_mastername, target_buildername,
 def RunSteps(api, target_mastername, target_buildername,
              good_revision, bad_revision,
              requested_compile_targets, use_analyze):
+  bot_desc = api.chromium_tests.create_bot_desc(
+      target_mastername, target_buildername)
   api.chromium_tests.configure_build(
-      target_mastername, target_buildername, override_bot_type='builder_tester')
+      bot_desc, override_bot_type='builder_tester')
 
   # Sync to bad revision, and retrieve revisions in the regression range.
   api.chromium_tests.prepare_checkout(
-      target_mastername, target_buildername,
-      root_solution_revision=bad_revision)
+      bot_desc, root_solution_revision=bad_revision)
   revisions_to_check = api.findit.revisions_between(good_revision, bad_revision)
 
   results = []