Componentize proxy code from chrome/browser/net

components/proxy_config/proxy_config_pref_names.h

Index: components/proxy_config/proxy_config_pref_names.h
diff --git a/components/proxy_config/proxy_config_pref_names.h b/components/proxy_config/proxy_config_pref_names.h
new file mode 100644
index 0000000000000000000000000000000000000000..4a6da1a1c6a800e6c912a340108a1034331f860e
--- /dev/null
+++ b/components/proxy_config/proxy_config_pref_names.h
@@ -0,0 +1,19 @@
+// 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.
+
+#ifndef COMPONENTS_PROXY_CONFIG_PROXY_CONFIG_PREF_NAMES_H_
+#define COMPONENTS_PROXY_CONFIG_PROXY_CONFIG_PREF_NAMES_H_
+
+#include "components/proxy_config/proxy_config_export.h"
+
+namespace proxy_config {
+namespace prefs {
+
+PROXY_CONFIG_EXPORT extern const char kProxy[];
+
+}  // namespace prefs
+}  // namespace proxy_config
+
+#endif  // COMPONENTS_PROXY_CONFIG_PROXY_CONFIG_PREF_NAMES_H_
+