Clean up some discrepancies in the perf recipe configs

scripts/slave/recipe_modules/chromium_tests/chromium_perf_fyi.py

Index: scripts/slave/recipe_modules/chromium_tests/chromium_perf_fyi.py
diff --git a/scripts/slave/recipe_modules/chromium_tests/chromium_perf_fyi.py b/scripts/slave/recipe_modules/chromium_tests/chromium_perf_fyi.py
index c584b8611fea868ba14b1b8810154a33740e8593..f22f6c2c2a462743dfddf7dbcf5e18af4ecc9d29 100644
--- a/scripts/slave/recipe_modules/chromium_tests/chromium_perf_fyi.py
+++ b/scripts/slave/recipe_modules/chromium_tests/chromium_perf_fyi.py
@@ -3,6 +3,7 @@
 # found in the LICENSE file.
 
 from . import chromium_perf
+from . import steps
 
 import DEPS
 CHROMIUM_CONFIG_CTX = DEPS['chromium'].CONFIG_CTX
@@ -31,15 +32,17 @@ def _AddBuildSpec(name, perf_id, platform, config_name='chromium_perf',
       config_name, perf_id, platform, target_bits)
 
 
-def _AddTestSpec(name, perf_id, platform,
-                 parent_builder=None, target_bits=64):
-  parent_buildername = (parent_builder or
-      chromium_perf.builders[platform][target_bits])
-  spec = chromium_perf.TestSpec('chromium_perf', parent_buildername, perf_id,
-                                platform, target_bits, 0, 1, 1)
-  if not parent_builder:
+def _AddTestSpec(name, perf_id, platform, parent_buildername=None, target_bits=64):

[RobertoCN, 2016/08/30 21:08:01]

Is this line long, or is my browser wrapping it wrongly?

[dtu, 2016/08/31 08:36:34]

Done.

+  tests = [steps.DynamicPerfTests(
+      perf_id, platform, target_bits,
+      num_device_shards=1, num_host_shards=1, shard_index=0)]
+
+  spec = chromium_perf.TestSpec(
+      'chromium_perf', platform, target_bits,
+      parent_buildername=parent_buildername, tests=tests)
+  if not parent_buildername:
     spec['parent_mastername'] = 'chromium.perf'
-  spec['disable_tests'] = True
+
   SPEC['builders'][name] = spec
 
 
@@ -60,4 +63,4 @@ _AddTestSpec('Mac Test Retina Perf', 'mac-test-retina', 'mac')
 _AddBuildSpec('Win Clang Builder', 'win-clang-builder', 'win',
               config_name='chromium_perf_clang', target_bits=32)
 _AddTestSpec('Win Clang Perf', 'chromium-win-clang', 'win',
-             parent_builder='Win Clang Builder', target_bits=32)
+             parent_buildername='Win Clang Builder', target_bits=32)