Don't build dart2js_bot on debug dart2js bots

tools/bots/compiler.py

Index: tools/bots/compiler.py
===================================================================
--- tools/bots/compiler.py	(revision 35843)
+++ tools/bots/compiler.py	(working copy)
@@ -281,11 +281,11 @@
         extras_flags = extras_flags + ['--host-checked']
       TestStep('dart2js_extra', mode, system, 'dart2js', runtime, extras,
                extras_flags, arch)
+      if mode == 'release':
+        TestStep('try_dart', mode, system, 'dart2js', runtime, ['try'],
+                 extras_flags, arch)
 
-      TestStep('try_dart', mode, system, 'dart2js', runtime, ['try'],
-               extras_flags, arch)
 
-
 def GetHasHardCodedCheckedMode(build_info):
   # TODO(ricow): We currently run checked mode tests on chrome on linux and
   # on the slow (all) IE windows bots. This is a hack and we should use the
@@ -370,8 +370,13 @@
       build and test to be run.
   """
   with bot.BuildStep('Build SDK'):
+    target = 'dart2js_bot'
+    # Try-dart takes more than 20 min in debug mode and makes the bot time out.
+    # We use the debug target which does not include try
+    if build_info.mode == 'debug':
+      target = 'dart2js_bot_debug'
     args = [sys.executable, './tools/build.py', '--mode=' + build_info.mode,
-            '--arch=' + build_info.arch, 'dart2js_bot']
+            '--arch=' + build_info.arch, target]
     print 'Build SDK and d8: %s' % (' '.join(args))
     bot.RunProcess(args)