Don't allow updating tabs to javascript URLs without host

chrome/browser/extensions/extension_function_dispatcher.cc

Index: chrome/browser/extensions/extension_function_dispatcher.cc
diff --git a/chrome/browser/extensions/extension_function_dispatcher.cc b/chrome/browser/extensions/extension_function_dispatcher.cc
index d0281c37583afa0619bad3f01abcde16dce60616..9892b4343023f73d82fb2574d7aaa2c68ce81537 100644
--- a/chrome/browser/extensions/extension_function_dispatcher.cc
+++ b/chrome/browser/extensions/extension_function_dispatcher.cc
@@ -245,6 +245,16 @@ ExtensionHost* ExtensionFunctionDispatcher::GetExtensionHost() {
   return delegate_->GetExtensionHost();
 }
 
+Extension* ExtensionFunctionDispatcher::GetExtension() {
+  ExtensionsService* service = profile()->GetExtensionsService();
+  DCHECK(service);
+
+  Extension* extension = service->GetExtensionById(extension_id());
+  DCHECK(extension);
+
+  return extension;
+}
+
 void ExtensionFunctionDispatcher::HandleRequest(const std::string& name,
                                                 const std::string& args,
                                                 int request_id,