Add proxy_config component

components/proxy_config/BUILD.gn

Index: components/proxy_config/BUILD.gn
diff --git a/components/proxy_config/BUILD.gn b/components/proxy_config/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..59245af5c61bbf761cbd0075c8f694912748b41f
--- /dev/null
+++ b/components/proxy_config/BUILD.gn
@@ -0,0 +1,20 @@
+# Copyright 2015 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.
+
+# GYP version: components/proxy_config.gypi:proxy_config_component
+component("proxy_config") {
+  sources = [
+    "proxy_config_dictionary.cc",
+    "proxy_config_dictionary.h",
+    "proxy_config_export.h",
+    "proxy_prefs.cc",
+    "proxy_prefs.h",
+  ]
+
+  defines = [ "PROXY_CONFIG_IMPLEMENTATION" ]
+
+  deps = [
+    "//base",
+  ]
+}