Update Compile Step to Build Swarm Targets if Needed

masters/master.tryserver.chromium/master.cfg

Index: masters/master.tryserver.chromium/master.cfg
diff --git a/masters/master.tryserver.chromium/master.cfg b/masters/master.tryserver.chromium/master.cfg
index 5b533ebef366ae50f7d6a0e73064b8fea8ed87cb..a8b3635eadded9f2e8e3d82caaa2ed729dafea54 100644
--- a/masters/master.tryserver.chromium/master.cfg
+++ b/masters/master.tryserver.chromium/master.cfg
@@ -174,6 +174,10 @@ def CreateBuilder(platform, builder_name, target,
   enable_swarm_tests = builder_name in ('linux', 'linux_rel', 'mac', 'mac_rel',
                                         'win', 'win_rel')
 
+  # Ensure that all targets are build when compiling with swarm enabled.
+  if enable_swarm_tests:
+    options.append('all')
+
   if annotation_script:
     # Note new slave type AnnotatedTrybot; we don't want a compile step added
     # in gclient_factory.py.