Add a compile-only config to chromium_trybot

scripts/slave/recipes/chromium_trybot.py

Index: scripts/slave/recipes/chromium_trybot.py
===================================================================
--- scripts/slave/recipes/chromium_trybot.py	(revision 251912)
+++ scripts/slave/recipes/chromium_trybot.py	(working copy)
@@ -81,6 +81,10 @@
     'chromium_config': 'chromium_clang',
     'compile_only': True,
   },
+  'compile': {

[agable, 2014/02/19 01:56:26]

Seems like we can probably have a more descriptive name than that?

[Paweł Hajdan Jr., 2014/02/19 02:04:40]

Not sure what would be better. Keeping it short seems to also help.

I think it fits well with other names here, but I'm open to specific suggestions
what the name should be.

+    'chromium_config': 'chromium',
+    'compile_only': True,
+  },
 }