Make possible restarting extensions from the chrome://extensions/ page....

chrome/browser/extensions/extensions_service.cc

Index: chrome/browser/extensions/extensions_service.cc
===================================================================
--- chrome/browser/extensions/extensions_service.cc	(revision 21643)
+++ chrome/browser/extensions/extensions_service.cc	(working copy)
@@ -354,6 +354,14 @@
       alert_on_error, scoped_refptr<ExtensionsService>(this)));
 }
 
+void ExtensionsService::ReloadExtension(const std::string& extension_id) {
+  Extension* extension = GetExtensionById(extension_id);
+  FilePath extension_path = extension->path();
+
+  UnloadExtension(extension_id);
+  LoadExtension(extension_path);
+}
+
 void ExtensionsService::UninstallExtension(const std::string& extension_id,
                                            bool external_uninstall) {
   Extension* extension = GetExtensionById(extension_id);