Remove unnecessary dependencies on mojo/edk/system

content/child/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")
 import("//content/child/child.gni")
 
 source_set("child") {
   # Targets external to content should always link to the public API.
@@ skipping 14 matching lines @@
                         ".",
                         "//content")
 
   configs += [
     "//build/config:precompiled_headers",
     "//content/public/common:mojo_shell_client",
   ]
 
   public_deps = [
     "//gpu/ipc/client:client",
-    "//mojo/edk/system",
   ]
 
   deps = [
     "//base",
     "//components/mime_util",
     "//components/scheduler:scheduler",
     "//components/tracing",
     "//components/tracing:startup_tracing",
     "//components/webcrypto",
     "//content/app/resources",
     "//content/app/strings",
     "//content/common",
     "//content/public/common:common_sources",
     "//crypto:platform",
     "//gpu/command_buffer/client",
     "//ipc/mojo",
     "//media",
     "//mojo/common",
+    "//mojo/edk/system",
     "//net",
     "//services/shell/public/interfaces",
     "//services/shell/runner/common",
     "//skia",
     "//storage/common",
     "//third_party/WebKit/public:blink_headers",
     "//third_party/WebKit/public:image_resources",
     "//third_party/WebKit/public:resources",
     "//third_party/icu",
     "//ui/base",
@@ skipping 36 matching lines @@
 
 # See comment at the top of //content/BUILD.gn for how this works.
 group("for_content_tests") {
   visibility = [ "//content/test/*" ]
   if (!is_component_build) {
     public_deps = [
       ":child",
     ]
   }
 }