Add chromeos-chrome to rebuild blacklist for faster builds.

parallel_emerge

 #!/usr/bin/python2.6
 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Program to run emerge in parallel, for significant speedup.
 
 Usage:
  ./parallel_emerge [--board=BOARD] [--workon=PKGS] [--no-workon-deps]
                    [emerge args] package"
@@ skipping 620 matching lines @@
 
     # final_pkgs is a set of the packages we found in the final_db. These
     # packages are either already installed, or will be installed by the time
     # we're done. It's populated in BuildFinalPackageSet()
     final_pkgs = set()
 
     # These packages take a really long time to build, so, for expediency, we
     # are blacklisting them from automatic rebuilds because one of their
     # dependencies needs to be recompiled.
     rebuild_blacklist = set()
-    for pkg in ("media-plugins/o3d", "dev-java/icedtea"):
+    for pkg in ("chromeos-base/chromeos-chrome", "media-plugins/o3d",
+                "dev-java/icedtea"):
       for match in final_db.match_pkgs(pkg):
         rebuild_blacklist.add(str(match.cpv))
 
     # deps_map is the actual dependency graph.
     #
     # Each package specifies a "needs" list and a "provides" list. The "needs"
     # list indicates which packages we depend on. The "provides" list
     # indicates the reverse dependencies -- what packages need us.
     #
     # We also provide some other information in the dependency graph:
@@ skipping 1113 matching lines @@
   # need to upgrade the rest of the packages. So we'll go ahead and do that.
   if portage_upgrade:
     args = sys.argv[1:] + ["--nomerge=sys-apps/portage"]
     os.execvp(os.path.realpath(sys.argv[0]), args)
 
   print "Done"
   sys.exit(0)
 
 if __name__ == "__main__":
   main()