Fix enabled state of an input field in the browser settings.

chrome/browser/resources/options/browser_options.js

Index: chrome/browser/resources/options/browser_options.js
diff --git a/chrome/browser/resources/options/browser_options.js b/chrome/browser/resources/options/browser_options.js
index 871e5206cf07576bd31e58d313a3a2c3169884f8..26b395d2bcb16c7f860d73e08bc3fa459078b98c 100644
--- a/chrome/browser/resources/options/browser_options.js
+++ b/chrome/browser/resources/options/browser_options.js
@@ -402,7 +402,12 @@ cr.define('options', function() {
      */
     updateCustomStartupPageControlStates_: function() {
       var disable = !this.shouldEnableCustomStartupPageControls();
-      $('startupPagesList').disabled = disable;
+      var startupPagesList = $('startupPagesList');
+      startupPagesList.disabled = disable;
+      // Explicitly set disabled state for input text elements.
+      var inputs = startupPagesList.querySelectorAll("input[type='text']");
+      for (var i = 0; i < inputs.length; i++)
+        inputs[i].disabled = disable;
       $('startupUseCurrentButton').disabled = disable;
     },