Unknown options in extension manifest file are silently ignored

chrome/browser/ui/webui/extensions/extension_settings_handler.cc

Index: chrome/browser/ui/webui/extensions/extension_settings_handler.cc
diff --git a/chrome/browser/ui/webui/extensions/extension_settings_handler.cc b/chrome/browser/ui/webui/extensions/extension_settings_handler.cc
index 75915b69f6ea2bcf914851af68aa97627e3c09f4..8dc1b55425590d128c1ced3e3fa6108af37e8b37 100644
--- a/chrome/browser/ui/webui/extensions/extension_settings_handler.cc
+++ b/chrome/browser/ui/webui/extensions/extension_settings_handler.cc
@@ -35,6 +35,7 @@
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_icon_set.h"
 #include "chrome/common/extensions/extension_set.h"
+#include "chrome/common/extensions/manifest.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/url_constants.h"
 #include "content/public/browser/notification_service.h"
@@ -214,6 +215,17 @@ DictionaryValue* ExtensionSettingsHandler::CreateExtensionDetailValue(
     extension_data->Set("installWarnings", list.release());
   }
 
+  // Add unrecognized manifest keys.
+  const std::vector<std::string> unrecognized_keys =
+      extension->manifest()->GetUnrecognizedKeys();
+  if (!unrecognized_keys.empty()) {
+    scoped_ptr<ListValue> list(new ListValue());
+    std::vector<std::string>::const_iterator it;
+    for (it = unrecognized_keys.begin(); it != unrecognized_keys.end(); ++it)
+      list->Append(Value::CreateStringValue(*it));
+    extension_data->Set("unrecognizedKeys", list.release());
+  }
+
   return extension_data;
 }
 
@@ -247,6 +259,8 @@ void ExtensionSettingsHandler::GetLocalizedValues(
       l10n_util::GetStringUTF16(IDS_EXTENSIONS_INSPECT_VIEWS));
   localized_strings->SetString("extensionSettingsInstallWarnings",
       l10n_util::GetStringUTF16(IDS_EXTENSIONS_INSTALL_WARNINGS));
+  localized_strings->SetString("extensionSettingsUnrecognizedManifestKeys",
+      l10n_util::GetStringUTF16(IDS_EXTENSIONS_UNRECOGNIZED_MANIFEST_KEYS));
   localized_strings->SetString("viewIncognito",
       l10n_util::GetStringUTF16(IDS_EXTENSIONS_VIEW_INCOGNITO));
   localized_strings->SetString("viewInactive",