Extensions: Move cast_channel and hid APIs to extensions/.

extensions/browser/api/cast_channel/cast_auth_util.h

 // Copyright 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.
 
-#ifndef CHROME_BROWSER_EXTENSIONS_API_CAST_CHANNEL_CAST_AUTH_UTIL_H_
-#define CHROME_BROWSER_EXTENSIONS_API_CAST_CHANNEL_CAST_AUTH_UTIL_H_
+#ifndef EXTENSIONS_BROWSER_API_CAST_CHANNEL_CAST_AUTH_UTIL_H_
+#define EXTENSIONS_BROWSER_API_CAST_CHANNEL_CAST_AUTH_UTIL_H_
 
 #include <string>
 
 namespace extensions {
-namespace api {
+namespace core_api {
 namespace cast_channel {
 
 class CastMessage;
 
 // Authenticates the given |challenge_reply|:
 // 1. Signature contained in the reply is valid.
 // 2. Certficate used to sign is rooted to a trusted CA.
 bool AuthenticateChallengeReply(const CastMessage& challenge_reply,
                                 const std::string& peer_cert);
 
 }  // namespace cast_channel
-}  // namespace api
+}  // namespace core_api
 }  // namespace extensions
 
-#endif  // CHROME_BROWSER_EXTENSIONS_API_CAST_CHANNEL_CAST_AUTH_UTIL_H_
+#endif  // EXTENSIONS_BROWSER_API_CAST_CHANNEL_CAST_AUTH_UTIL_H_