Implement extension controlled indicators, starting with New Tab page

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 7f8dc313579953e95e14a31efe51c379ff6982c4..38ac15a1c6bf4a4b969f7d3f83e7e377bec45a8c 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -10017,9 +10017,6 @@ I don't think this site should be blocked!
         <message name="IDS_OPTIONS_CONTROLLED_SETTING_EXTENSION_WITH_NAME" desc="Text displayed in the controlled settings bubble when a setting's value is enforced by an extension. The name of the extension would be displayed on the following line, thus the ending with ':'.">
           This setting is controlled by:
         </message>
-        <message name="IDS_SETTINGS_CONTROLLED_SETTING_NAMED_EXTENSION" desc="Text displayed in the controlled settings indicator tooltip when a setting's value is enforced by an extension.">
-          This setting is controlled by extension <ph name="NAME">$1<ex>Adblocker plusplus</ex></ph>
-        </message>
         <message name="IDS_OPTIONS_CONTROLLED_SETTING_MANAGE_EXTENSION" desc="Text displayed for a link to manage extension from the controlled settings bubble.">
           Manage extension
         </message>