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

extensions/browser/api/sockets_tcp_server/sockets_tcp_server_api.h

Index: extensions/browser/api/sockets_tcp_server/sockets_tcp_server_api.h
diff --git a/extensions/browser/api/sockets_tcp_server/sockets_tcp_server_api.h b/extensions/browser/api/sockets_tcp_server/sockets_tcp_server_api.h
index 531fd2cb19ec0c9db545b65a5185b90e65e88edd..9c74a48e440360dd1cd5e728db6e46a5ccf61d66 100644
--- a/extensions/browser/api/sockets_tcp_server/sockets_tcp_server_api.h
+++ b/extensions/browser/api/sockets_tcp_server/sockets_tcp_server_api.h
@@ -13,7 +13,7 @@ class ResumableTCPServerSocket;
 }
 
 namespace extensions {
-namespace core_api {
+namespace api {
 
 class TCPServerSocketAsyncApiFunction : public SocketAsyncApiFunction {
  protected:
@@ -172,7 +172,7 @@ class SocketsTcpServerGetSocketsFunction
   void Work() override;
 };
 
-}  // namespace core_api
+}  // namespace api
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_SOCKETS_TCP_SERVER_SOCKETS_TCP_SERVER_API_H_