Add material design toggle ripple element.

ui/file_manager/file_manager/foreground/js/gear_menu_controller.js

Index: ui/file_manager/file_manager/foreground/js/gear_menu_controller.js
diff --git a/ui/file_manager/file_manager/foreground/js/gear_menu_controller.js b/ui/file_manager/file_manager/foreground/js/gear_menu_controller.js
index 48e9ae2e7a1f1a4626b32188f16163b9ec352fc5..fc1bbbf65c1cbe222e4ac9e2daf8222b776f87c1 100644
--- a/ui/file_manager/file_manager/foreground/js/gear_menu_controller.js
+++ b/ui/file_manager/file_manager/foreground/js/gear_menu_controller.js
@@ -4,6 +4,7 @@
 
 /**
  * @param {!cr.ui.MenuButton} gearButton
+ * @param {!FilesToggleRipple} toggleRipple
  * @param {!GearMenu} gearMenu
  * @param {!DirectoryModel} directoryModel
  * @param {!CommandHandler} commandHandler
@@ -11,7 +12,14 @@
  * @struct
  */
 function GearMenuController(
-    gearButton, gearMenu, directoryModel, commandHandler) {
+    gearButton, toggleRipple, gearMenu, directoryModel, commandHandler) {
+  /**
+   * @type {!FilesToggleRipple}
+   * @const
+   * @private
+   */
+  this.toggleRipple_ = toggleRipple;
+
   /**
    * @type {!GearMenu}
    * @const
@@ -34,6 +42,7 @@ function GearMenuController(
   this.commandHandler_ = commandHandler;
 
   gearButton.addEventListener('menushow', this.onShowGearMenu_.bind(this));
+  gearButton.addEventListener('menuhide', this.onHideGearMenu_.bind(this));
   directoryModel.addEventListener(
       'directory-changed', this.onDirectoryChanged_.bind(this));
   chrome.fileManagerPrivate.onPreferencesChanged.addListener(
@@ -45,6 +54,7 @@ function GearMenuController(
  * @private
  */
 GearMenuController.prototype.onShowGearMenu_ = function() {
+  this.toggleRipple_.activated = true;
   this.refreshRemainingSpace_(false);  /* Without loading caption. */
 
   // Update view of drive-related settings.
@@ -52,6 +62,13 @@ GearMenuController.prototype.onShowGearMenu_ = function() {
 };
 
 /**
+ * @private
+ */
+GearMenuController.prototype.onHideGearMenu_ = function() {
+  this.toggleRipple_.activated = false;
+};
+
+/**
  * @param {Event} event
  * @private
  */