[ios] Removed //components/prefs dependency from net.

net/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.
 
 import("//build/buildflag_header.gni")
 import("//build/config/chromecast_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
@@ skipping 102 matching lines @@
     ":net_quic_proto",
     "//crypto",
     "//crypto:platform",
   ]
 
   if (!is_nacl) {
     sources += gypi_values.net_non_nacl_sources
 
     deps += [
       "//base/third_party/dynamic_annotations",
-      "//components/prefs",
       "//sdch",
       "//third_party/zlib",
     ]
 
     if (!use_kerberos) {
       sources -= [
         "http/http_auth_handler_negotiate.cc",
         "http/http_auth_handler_negotiate.h",
       ]
     }
@@ skipping 1933 matching lines @@
     "http/http_security_headers_hpkp_report_only_fuzzer.cc",
   ]
   deps = [
     ":net_fuzzer_test_support",
     "//base",
     "//net",
     "//url",
   ]
   dict = "data/fuzzer_dictionaries/net_http_security_headers_fuzzer.dict"
 }