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

chrome/browser/extensions/extension_service.cc

Index: chrome/browser/extensions/extension_service.cc
diff --git a/chrome/browser/extensions/extension_service.cc b/chrome/browser/extensions/extension_service.cc
index b4580a8f776ea13cc1d388bbc3fa0224bf602843..8e5e11ba7b14c5f5d4d506a49ade736d070b2032 100644
--- a/chrome/browser/extensions/extension_service.cc
+++ b/chrome/browser/extensions/extension_service.cc
@@ -86,6 +86,7 @@
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
+#include "chrome/common/chrome_version_info.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_error_utils.h"
 #include "chrome/common/extensions/extension_file_util.h"
@@ -2440,6 +2441,10 @@ void ExtensionService::Observe(int type,
       if (!profile_->IsSameProfile(host_profile->GetOriginalProfile()))
           break;
 
+      // Extensions need to know the channel for API restrictions.
+      process->Send(new ExtensionMsg_SetChannel(
+          chrome::VersionInfo::GetChannel()));
+
       // Valid extension function names, used to setup bindings in renderer.
       std::vector<std::string> function_names;
       ExtensionFunctionDispatcher::GetAllFunctionNames(&function_names);