Add components/keyed_service to GN build.

BUILD.gn

 # Copyright (c) 2013 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.
 
 # This is the root build file for GN. GN will start processing by loading this
 # file, and recursively load all dependencies until all dependencies are either
 # resolved or known not to exist (which will cause the build to fail). So if
 # you add a new build file, there must be some path of dependencies from this
 # file to your new one or GN won't know about it.
 
@@ skipping 92 matching lines @@
     "//v8:v8",
     "//webkit/browser:storage",
     "//webkit/child",
   ]
 
   if (!is_win) {
     # TODO(brettw) re-enable once this compiles reliably.
     #deps += [ "//breakpad:symupload" ]
   }
 
+  if (!is_ios) {
+    deps += [ "//components/keyed_service/content" ]
+  }
+
   if (is_linux) {
     deps += [
       "//dbus",
       "//third_party/fontconfig",
       "//third_party/freetype2",
     ]
   }
 
   if (is_win) {
     deps += [
@@ skipping 10 matching lines @@
 
   if (cpu_arch == "x86" || cpu_arch == "x64") {
     # YASM is x86/x64 only.
     deps += [ "//third_party/yasm($host_toolchain)" ]
   }
 
   if (is_android) {
     deps -= [
       "//cc",
       "//content",
+      "//components/keyed_service/content",  # Blocked on content.
       "//components/user_prefs",  # Blocked on content.
       "//components/visitedlink/browser",  # Blocked on content.
       "//components/visitedlink/common",  # Blocked on content.
       "//extensions/common/api:extensions_api",
       "//pdf",  # Not compiled on Android in GYP yet, either.
       "//ppapi:ppapi_c",
       "//sandbox",
       "//third_party/libusb",
 
       # Seems to not be compiled on Android. Otherwise it will need a config.h.
@@ skipping 15 matching lines @@
     ]
   }
 
   if (use_ozone) {
     deps += [
       "//ui/events/ozone:events_ozone",
       "//ui/events/ozone:events_ozone_evdev",
     ]
   }
 }