Handle more scale factors for extension Browser Action icons

extensions/common/manifest_handler_helpers.h

Index: extensions/common/manifest_handler_helpers.h
diff --git a/extensions/common/manifest_handler_helpers.h b/extensions/common/manifest_handler_helpers.h
index 01fe6ccf55073fff426bc1f3b7896d0d23a1ad23..4f88174e5392273dd91366c80a843e8573610bf6 100644
--- a/extensions/common/manifest_handler_helpers.h
+++ b/extensions/common/manifest_handler_helpers.h
@@ -33,6 +33,11 @@ bool LoadIconsFromDictionary(const base::DictionaryValue* icons_value,
                              ExtensionIconSet* icons,
                              base::string16* error);
 
+// As above, but loads all icons in |icons_value|.
+bool LoadAllIconsFromDictionary(const base::DictionaryValue* icons_value,
+                                ExtensionIconSet* icons,
+                                base::string16* error);
+
 }  // namespace manifest_handler_helpers
 }  // namespace extensions