Generate all extension schema namespaces as "api" and instead vary the generated bundle names.

extensions/browser/api/cast_channel/cast_auth_util.h

 // 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.
 
 #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 core_api {
+namespace api {
 namespace cast_channel {
 
 class AuthResponse;
 class CastMessage;
 class DeviceAuthMessage;
 
 struct AuthResult {
  public:
   enum ErrorType {
     ERROR_NONE,
@@ skipping 42 matching lines @@
 AuthResult AuthenticateChallengeReply(const CastMessage& challenge_reply,
                                       const std::string& peer_cert);
 
 // Auth-library specific implementation of cryptographic signature
 // verification routines. Verifies that |response| contains a
 // valid signed form of |peer_cert|.
 AuthResult VerifyCredentials(const AuthResponse& response,
                              const std::string& peer_cert);
 
 }  // namespace cast_channel
-}  // namespace core_api
+}  // namespace api
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_CAST_CHANNEL_CAST_AUTH_UTIL_H_