Plugin Power Saver: Overhaul plugin-power-saver flags. Show in UI.

chrome/browser/resources/options/content_settings.js

Index: chrome/browser/resources/options/content_settings.js
diff --git a/chrome/browser/resources/options/content_settings.js b/chrome/browser/resources/options/content_settings.js
index db6fbf6b92829cbaa50a485efdde8a65ac8e1fb6..a53df40020321f9906eab392ce7a721bd3bf811d 100644
--- a/chrome/browser/resources/options/content_settings.js
+++ b/chrome/browser/resources/options/content_settings.js
@@ -293,6 +293,13 @@ cr.define('options', function() {
   };
 
   /**
+   * Disable the 'allow' option in the Plugins section.
+   */
+  ContentSettings.disablePluginsAllowOption = function() {
+    $('plugins-allow-radio').disabled = true;
+  };
+
+  /**
    * Updates the microphone/camera devices menu with the given entries.
    * @param {string} type The device type.
    * @param {Array} devices List of available devices.