Roll infra/go/src/github.com/luci/luci-go/ to b85c6dd748361e8244122faac44b5beefcd2db37.

DEPS

 vars = {
   # npm_modules.git is special: we can't check it out on Windows because paths
   # there are too long for Windows. Instead we use 'deps_os' gclient feature to
   # checkout it out only on Linux and Mac.
   "npm_modules_revision": "c04524294e091a0ece892c5b65bb64aa5c7b9133",
 }
 
 deps = {
   "build":
     "https://chromium.googlesource.com/chromium/tools/build.git",
 
   "infra/luci":
    ("https://chromium.googlesource.com/external/github.com/luci/luci-py"
      "@7f6c260b7664e39915c3b99bfe3d4283667165ab"),
 
   "infra/go/src/github.com/luci/luci-go":
     ("https://chromium.googlesource.com/external/github.com/luci/luci-go"
-     "@cd33aabb0c7b994c11a97ff49a6d9fcc721ff564"),
+     "@b85c6dd748361e8244122faac44b5beefcd2db37"),
 
   # Appengine third_party DEPS
   "infra/appengine/third_party/bootstrap":
     ("https://chromium.googlesource.com/infra/third_party/bootstrap.git"
      "@b4895a0d6dc493f17fe9092db4debe44182d42ac"),
 
   "infra/appengine/third_party/cloudstorage":
     ("https://chromium.googlesource.com/infra/third_party/cloudstorage.git"
      "@ad74316d12e198e0c7352bd666bbc2ec7938bd65"),
 
@@ skipping 80 matching lines @@
     "pattern": ".",
     "action": [
       "python", "-u", "./infra/bootstrap/get_appengine.py", "--dest=.",
       "--go",
     ],
     # extract in go_appengine/
   },
 ]
 
 recursedeps = ['build']