Centralize mojo edk initialization path for some unit tests.

third_party/WebKit/Source/web/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/ui.gni")
 import("//testing/test.gni")
 import("//third_party/WebKit/Source/bindings/bindings.gni")
 import("//third_party/WebKit/Source/config.gni")
 import("//third_party/WebKit/Source/core/core.gni")
 import("//third_party/WebKit/Source/modules/modules.gni")
@@ skipping 381 matching lines @@
 
   deps = [
     ":test_support",
     ":web",
     "//base",
     "//base:i18n",
     "//base/test:test_support",
     "//content/test:test_support",
     "//device/wake_lock/public/interfaces:interfaces_blink",
     "//gpu:test_support",
-    "//mojo/edk/system:system",
     "//testing/gmock",
     "//testing/gtest",
     "//third_party/WebKit/Source/core:unit_tests",
     "//third_party/WebKit/Source/modules:unit_tests",
     "//third_party/WebKit/Source/platform:test_support",
     "//third_party/WebKit/Source/platform:unit_tests",
     "//third_party/WebKit/Source/wtf",
     "//third_party/libwebp",
     "//third_party/zlib",
     "//url",
@@ skipping 12 matching lines @@
 
   if (is_android) {
     deps += [
       "//base:base_java",
       "//content/public/android:content_java",
       "//content/shell/android:content_shell_assets",
       "//net/android:net_java",
     ]
   }
 }