Disable chrome://options UI elements if the corresponding preference is not user-modifiable.

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 7df61a348af6bd9d0ce3a9b8238b98b69c395798..ccf28a3b5dfab055efb501abf9dfb2820064c4d4 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -7785,6 +7785,22 @@ Keep your key file in a safe place. You will need it to create new versions of y
       </if>
 
       <if expr="pp_ifdef('chromeos')">
+        <message name="IDS_OPTIONS_EXTENSION_MANAGED_PREFS" desc="ChromeOS tooltip displayed for an extension-managed option the user won't be able to change.">
+          This setting is managed by an extension.
+        </message>
+      </if>
+      <if expr="not pp_ifdef('chromeos') and is_posix">
+        <message name="IDS_OPTIONS_EXTENSION_MANAGED_PREFS" desc="Mac/Linux tooltip displayed for an extension-managed option the user won't be able to change.">
+          This preference is managed by an extension.
+        </message>
+      </if>
+      <if expr="os == 'win32'">
+        <message name="IDS_OPTIONS_EXTENSION_MANAGED_PREFS" desc="Windows tooltip displayed for an extension-managed option the user won't be able to change.">
+          This option is managed by an extension.
+        </message>
+      </if>
+
+      <if expr="pp_ifdef('chromeos')">
         <message name="IDS_OPTIONS_MANAGED_PREFS" desc="ChromeOS banner displayed in case there are managed options the user won't be able to change.">
           Some settings have been disabled by your IT administrator.
         </message>