Allows client to access auth token from command line specified file.

blimp/client/BUILD.gn

Index: blimp/client/BUILD.gn
diff --git a/blimp/client/BUILD.gn b/blimp/client/BUILD.gn
index d773b26a7a3856d87993ac05e3a9b09e9d98a4e8..9fcfd5e622d1662455e583a8597c23f823ab6a1c 100644
--- a/blimp/client/BUILD.gn
+++ b/blimp/client/BUILD.gn
@@ -99,10 +99,15 @@ source_set("blimp_client_unit_tests") {
   if (is_linux) {
     sources += [ "session/assignment_source_unittest.cc" ]
     deps += [
+      "//blimp/common",
+      "//blimp/common:test_support",
       "//components/safe_json:test_support",
       "//net:test_support",
     ]
-    data += [ "session/test_selfsigned_cert.pem" ]
+    data += [
+      "session/test_selfsigned_cert.pem",
+      "//blimp/test/data/test_client_token",
+    ]
   }
 }