Move the "extension" namespace from extension_api.json into extension_api_extension.json.

chrome/renderer/extensions/schema_generated_bindings.h

 // Copyright (c) 2011 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_RENDERER_EXTENSIONS_SCHEMA_GENERATED_BINDINGS_H_
 #define CHROME_RENDERER_EXTENSIONS_SCHEMA_GENERATED_BINDINGS_H_
 #pragma once
 
 #include <string>
 
 class ExtensionDispatcher;
 class ChromeV8ContextSet;
 
 namespace v8 {
 class Extension;
 }
 
 namespace extensions {
 
-// Generates JavaScript bindings for the extension system from the declarations
-// in the extension_api.json file.
+// Generates JavaScript bindings for the extension system from the JSON
+// declarations in chrome/common/extensions/api/.
 class SchemaGeneratedBindings {
  public:
   static v8::Extension* Get(ExtensionDispatcher* extension_dispatcher);
 
   // Handles a response to an API request.  Sets |extension_id|.
   static void HandleResponse(const ChromeV8ContextSet& contexts,
                              int request_id,
                              bool success,
                              const std::string& response,
                              const std::string& error,
                              std::string* extension_id);
 
   static bool HasPendingRequests(const std::string& extension_id);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_RENDERER_EXTENSIONS_SCHEMA_GENERATED_BINDINGS_H_