Add iOS try bots using the new iOS try bot recipe

scripts/slave/recipes/ios/try.py

Index: scripts/slave/recipes/ios/try.py
diff --git a/scripts/slave/recipes/ios/try.py b/scripts/slave/recipes/ios/try.py
index 73c44e48b556e6eedb3f7705eba4482542c4a3c0..224ed390b68ba45b9df5eb09529f18c01787f877 100644
--- a/scripts/slave/recipes/ios/try.py
+++ b/scripts/slave/recipes/ios/try.py
@@ -11,11 +11,7 @@ DEPS = [
 def GenSteps(api):
   api.ios.host_info()
   api.ios.checkout()
-
-  # A try bot gets its config by reading a build config file as if it were
-  # running on the main waterfall. This ensures try bots always match the
-  # main waterfall config.
-  api.ios.read_build_config(master_name='chromium.mac')

[smut, 2015/02/20 19:42:10]

I had to take this forced main waterfall matching out because we want upstream
main and try to differ. We ultimately want just ninja bots on the CQ (see bug).

[lliabraa, 2015/02/20 20:29:25]

Acknowledged.

+  api.ios.read_build_config()
   api.ios.build()
   api.ios.test()