Dispatch a new event chrome.contextMenus.onClicked.

chrome/browser/extensions/api/context_menu/context_menu_api.cc

Index: chrome/browser/extensions/api/context_menu/context_menu_api.cc
diff --git a/chrome/browser/extensions/api/context_menu/context_menu_api.cc b/chrome/browser/extensions/api/context_menu/context_menu_api.cc
index 2976b065de8d2b24a457cc91f861996682d176b5..15dd7967c734b35c7abb4affa5ec543f73eee662 100644
--- a/chrome/browser/extensions/api/context_menu/context_menu_api.cc
+++ b/chrome/browser/extensions/api/context_menu/context_menu_api.cc
@@ -21,12 +21,16 @@ const char kDocumentUrlPatternsKey[] = "documentUrlPatterns";
 const char kEnabledKey[] = "enabled";
 const char kGeneratedIdKey[] = "generatedId";
 const char kIdKey[] = "id";
+const char kOnclickKey[] = "onclick";
 const char kParentIdKey[] = "parentId";
 const char kTargetUrlPatternsKey[] = "targetUrlPatterns";
 const char kTitleKey[] = "title";
 const char kTypeKey[] = "type";
 
 const char kCannotFindItemError[] = "Cannot find menu item with id *";
+const char kOnclickDisallowedError[] = "Extensions using event pages cannot "
+    "pass an onclick parameter to chrome.contextMenus.create. Instead, use "
+    "the chrome.contextMenus.onClicked event.";
 const char kCheckedError[] =
     "Only items with type \"radio\" or \"checkbox\" can be checked";
 const char kDuplicateIDError[] =
@@ -207,6 +211,12 @@ bool CreateContextMenuFunction::RunImpl() {
     return false;
   }
 
+  if (GetExtension()->has_lazy_background_page() &&
+      properties->HasKey(kOnclickKey)) {
+    error_ = kOnclickDisallowedError;
+    return false;
+  }
+
   ExtensionMenuItem::ContextList contexts(ExtensionMenuItem::PAGE);
   if (!ParseContexts(*properties, kContextsKey, &contexts))
     return false;