Added switch to guard all autofill new elements work.

chrome/app/generated_resources.grd

Index: chrome/app/generated_resources.grd
diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index 812db922626ccbf6f449aa5bbf70e5c28db4589c..fb26161d92e3d77935e77dbc225f8a3b129ff47e 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -6204,6 +6204,12 @@ Keep your key file in a safe place. You will need it to create new versions of y
       <message name="IDS_FLAGS_ENABLE_NEW_AUTOFILL_HEURISTICS_DESCRIPTION" desc="Description for the flag to enable new Autofill heuristics">
         Enable new Autofill heuristics.  This primarily covers detection of additional field types, such as credit card type.
       </message>
+      <message name="IDS_FLAGS_ENABLE_EXPERIMENTAL_FORM_FILLING_NAME" desc="Title for the flag to enable experimental form filling">
+        Enable experimental form filling
+      </message>
+      <message name="IDS_FLAGS_ENABLE_EXPERIMENTAL_FORM_FILLING_DESCRIPTION" desc="Description for the flag to enable experimantal form filling feature">
+        Enable experimental form filling. This allows detection of additional input elements like checkboxes and autofill them.

[Albert Bodenhamer, 2012/11/01 16:52:47]

I'd leave off the detailed description.  Maybe something just say something like
"Enables a collection of experimental features that make form filling easier."

[Raman Kakilate, 2012/11/01 19:09:56]

Done.

+      </message>
       <message name="IDS_FLAGS_SYNC_SEARCH_ENGINES_NAME" desc="Title for the flag to enable syncing the Search Engines datatype">
         Enable syncing search engines
       </message>