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

extensions/browser/api/sockets_udp/sockets_udp_api.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_SOCKETS_UDP_SOCKETS_UDP_API_H_
 #define EXTENSIONS_BROWSER_API_SOCKETS_UDP_SOCKETS_UDP_API_H_
 
 #include "extensions/browser/api/socket/socket_api.h"
 #include "extensions/common/api/sockets_udp.h"
 
 namespace extensions {
 class ResumableUDPSocket;
 }
 
 namespace extensions {
-namespace core_api {
+namespace api {
 
 class UDPSocketEventDispatcher;
 
 class UDPSocketAsyncApiFunction : public SocketAsyncApiFunction {
  protected:
   ~UDPSocketAsyncApiFunction() override;
 
   scoped_ptr<SocketResourceManagerInterface> CreateSocketResourceManager()
       override;
 
@@ skipping 257 matching lines @@
   ~SocketsUdpSetBroadcastFunction() override;
 
   // AsyncApiFunction
   bool Prepare() override;
   void Work() override;
 
  private:
   scoped_ptr<sockets_udp::SetBroadcast::Params> params_;
 };
 
-}  // namespace core_api
+}  // namespace api
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_SOCKETS_UDP_SOCKETS_UDP_API_H_