Hack to restrict runtime API to dev channel rather than experimental.

chrome/renderer/extensions/extension_dispatcher.h

 // 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.
 
 #ifndef CHROME_RENDERER_EXTENSIONS_EXTENSION_DISPATCHER_H_
 #define CHROME_RENDERER_EXTENSIONS_EXTENSION_DISPATCHER_H_
 #pragma once
 
 #include <set>
 #include <string>
@@ skipping 104 matching lines @@
   friend class RenderViewTest;
   typedef void (*BindingInstaller)(ModuleSystem* module_system,
                                   v8::Handle<v8::Object> chrome,
                                   v8::Handle<v8::Object> chrome_hidden);
 
   // RenderProcessObserver implementation:
   virtual bool OnControlMessageReceived(const IPC::Message& message) OVERRIDE;
   virtual void WebKitInitialized() OVERRIDE;
   virtual void IdleNotification() OVERRIDE;
 
+  void OnSetChannel(int channel);
   void OnMessageInvoke(const std::string& extension_id,
                        const std::string& function_name,
                        const base::ListValue& args,
                        const GURL& event_url,
                        bool user_gesture);
   void OnDispatchOnConnect(int target_port_id,
                            const std::string& channel_name,
                            const std::string& tab_json,
                            const std::string& source_extension_id,
                            const std::string& target_extension_id);
@@ skipping 95 matching lines @@
   // Cache for the v8 representation of extension API schemas.
   extensions::V8SchemaRegistry v8_schema_registry_;
 
   // Bindings that are defined lazily and have BindingInstallers to install
   // them.
   std::map<std::string, BindingInstaller> lazy_bindings_map_;
 
   // Sends API requests to the extension host.
   scoped_ptr<ExtensionRequestSender> request_sender_;
 
+  // The current channel. From VersionInfo::GetChannel().

[Yoyo Zhou, 2012/05/16 00:04:06]

Do you want to put in a TODO(aa) to remove this later too?

[Matt Perry, 2012/05/16 00:19:54]

Done.

+  int chrome_channel_;
+
   DISALLOW_COPY_AND_ASSIGN(ExtensionDispatcher);
 };
 
 #endif  // CHROME_RENDERER_EXTENSIONS_EXTENSION_DISPATCHER_H_