Move API functions registrations out of ExtensionFunctionRegistry.

chrome/common/extensions/api/terminal_private.json

 // Copyright (c) 2012 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.
 
 [
   {
     "namespace": "terminalPrivate",
+    "compiler_options": {
+      "implemented_in": "chrome/browser/extensions/api/terminal/terminal_private_api.h"
+    },
     "nodoc": true,
     "platforms": ["chromeos"],
     "types": [],
     "functions": [
       {
         "name": "openTerminalProcess",
         "type": "function",
         "description": "Starts new process.",
         "parameters": [
           {
@@ skipping 124 matching lines @@
           {
             "name": "text",
             "type": "string",
             "description": "Text that was written to the output stream."
           }
         ]
       }
     ]
   }
 ]