Revert of Refactoring of Cast-related crypto code

chrome/browser/extensions/api/networking_private/networking_private_credentials_getter_chromeos.cc

Index: chrome/browser/extensions/api/networking_private/networking_private_credentials_getter_chromeos.cc
diff --git a/chrome/browser/extensions/api/networking_private/networking_private_credentials_getter_chromeos.cc b/chrome/browser/extensions/api/networking_private/networking_private_credentials_getter_chromeos.cc
deleted file mode 100644
index a47b2e9427d11a23a70bd0d458a3e0cb2a677e35..0000000000000000000000000000000000000000
--- a/chrome/browser/extensions/api/networking_private/networking_private_credentials_getter_chromeos.cc
+++ /dev/null
@@ -1,43 +0,0 @@
-// 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.
-
-#include "chrome/browser/extensions/api/networking_private/networking_private_credentials_getter.h"
-
-const char kErrorNotImplemented[] = "Error.NotImplemented";
-
-namespace extensions {
-
-class NetworkingPrivateCredentialsGetterChromeos
-    : public NetworkingPrivateCredentialsGetter {
- public:
-  NetworkingPrivateCredentialsGetterChromeos() {}
-
-  void Start(const std::string& network_guid,
-             const std::string& public_key,
-             const CredentialsCallback& callback) override;
-
- private:
-  ~NetworkingPrivateCredentialsGetterChromeos() override;
-
-  DISALLOW_COPY_AND_ASSIGN(NetworkingPrivateCredentialsGetterChromeos);
-};
-
-NetworkingPrivateCredentialsGetterChromeos::
-    ~NetworkingPrivateCredentialsGetterChromeos() {
-}
-
-void NetworkingPrivateCredentialsGetterChromeos::Start(
-    const std::string& network_guid,
-    const std::string& public_key,
-    const CredentialsCallback& callback) {
-  // TODO(sheretov) add credential slurping from sync.
-  callback.Run(std::string(), kErrorNotImplemented);
-}
-
-NetworkingPrivateCredentialsGetter*
-NetworkingPrivateCredentialsGetter::Create() {
-  return new NetworkingPrivateCredentialsGetterChromeos();
-}
-
-}  // namespace extensions