Added switch to guard all autofill new elements work.

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index 52b6cd6f22e7c4888189f6afb71bbd5dccf2ff3e..48581fd171b4e26740fce7e57db4bbf863537d19 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -497,6 +497,10 @@ const char kEasyOffStoreExtensionInstall[] = "easy-off-store-extension-install";
 const char kEnableExperimentalExtensionApis[] =
     "enable-experimental-extension-apis";
 
+// Enable autofill for new elements like checkboxes. crbug.com/157636
+const char kEnableExperimentalFormFilling[] =
+    "enable-experimental-form-filling";
+
 // Enables logging for extension activity.
 const char kEnableExtensionActivityLogging[] =
     "enable-extension-activity-logging";