[New Tab Page] Add Field Trial support to the Local NTP

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 a35cd5c6bb93684ceaf46f1d317977bf815674b4..f5dbf07367ba1da2c7954eb0c1845166b8863c2e 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -6216,6 +6216,12 @@ Keep your key file in a safe place. You will need it to create new versions of y
       <message name="IDS_FLAGS_ENABLE_SYNC_APP_LIST_DESCRIPTION" desc="Description for the flag to enable syncing the app list.">
         Enable App Launcher sync. This also enables Folders where available (non OSX).
       </message>
+      <message name="IDS_FLAGS_ENABLE_NEW_NTP_DESIGN_NAME" desc="Name of the flag to enable the new New Tab Page (NTP) design.">
+        Enable New NTP Design.
+      </message>
+      <message name="IDS_FLAGS_ENABLE_NEW_NTP_DESIGN_DESCRIPTION" desc="Description for the flag to enable the new New Tab Page (NTP) design.">
+        Enable the new, experimental New Tab Page design.
+      </message>
       <if expr="is_macosx">
         <message name="IDS_FLAGS_ENABLE_AVFOUNDATION_NAME" desc="Name of the flag to enable Mac AVFoundation.">
           Enable use of Mac OS X AVFoundation APIs, instead of QTKit.