Make mojom targets depend on chromium mojo environment

chrome/installer/util/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/chrome_build.gni")
 import("//testing/test.gni")
 
 static_library("util") {
   deps = [
     "//base",
@@ skipping 259 matching lines @@
       ":util",
       "//base",
       "//base:i18n",
       "//base/test:test_support",
       "//chrome:other_version",
       "//chrome/common",
       "//chrome/installer/setup:lib",
       "//chrome/installer/test:alternate_version_generator_lib",
       "//components/variations",
       "//content/public/common",
-
-      # TODO(rockot): Remove this hack when we fix mojo environment deps.
-      # See http://crbug.com/501385
-      "//mojo/environment:chromium",
       "//testing/gmock",
       "//testing/gtest",
     ]
 
     # TODO(GYP) manifest: $(ProjectDir)\\installer\\mini_installer\\mini_installer.exe.manifest
   }
 }  # is_win