Reland of move configuration policy from chrome build files.

chrome/common/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/buildflag_header.gni")
 import("//chrome/common/features.gni")
 import("//chrome/version.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
 import("//tools/grit/grit_rule.gni")
 
@@ skipping 71 matching lines @@
     "//components/favicon_base",
     "//components/flags_ui:switches",
     "//components/gcm_driver/common",
     "//components/json_schema",
     "//components/metrics",
     "//components/metrics:net",
     "//components/nacl/common:process_type",
     "//components/nacl/common:switches",
     "//components/offline_pages:switches",
     "//components/omnibox/common",
+    "//components/policy",
     "//components/policy:policy_component_common",
     "//components/prefs",
     "//components/strings",
     "//components/translate/core/common",
     "//components/url_formatter",
     "//components/variations",
     "//components/version_info",
     "//content/public/common",
     "//crypto",
     "//extensions/common:common_constants",
@@ skipping 162 matching lines @@
   }
   if (enable_plugins && enable_extensions) {
     sources += [
       "pepper_permission_util.cc",
       "pepper_permission_util.h",
     ]
   }
   if (!enable_webrtc) {
     sources -= [ "media/webrtc_logging_messages.h" ]
   }
-  if (enable_configuration_policy) {
-    public_deps += [ "//components/policy" ]
-  }
 
   if (safe_browsing_mode == 1) {
     sources += rebase_path(gypi_values.chrome_common_full_safe_browsing_sources,
                            ".",
                            "//chrome")
   }
 }
 
 # GYP version: chrome/common_constants.gyp:version_header
 process_version("version_header") {
@@ skipping 107 matching lines @@
     ":constants",
     "//base",
   ]
 }
 
 mojom("mojo_bindings") {
   sources = [
     "resource_usage_reporter.mojom",
   ]
 }