Revert "Move mojo edk into mojo/edk"

chrome/test/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/features.gni")
 import("//build/config/ui.gni")
 
 # GYP version: chrome/chrome_tests_unit.gypi:test_support_common
 source_set("test_support") {
   testonly = true
@@ skipping 163 matching lines @@
     "base/run_all_unittests.cc",
   ]
 
   deps = [
     ":test_support",
     "//base",
     "//chrome:resources",
     "//chrome:strings",
     "//chrome/browser",
     "//chrome/common",
-    "//mojo/edk/system",
     "//mojo/environment:chromium",
+    "//mojo/system",
   ]
 }