Add material design toggle ripple element.

ui/file_manager/externs/files_elements.js

Index: ui/file_manager/externs/files_elements.js
diff --git a/ui/compositor/reflector.cc b/ui/file_manager/externs/files_elements.js
similarity index 54%
copy from ui/compositor/reflector.cc
copy to ui/file_manager/externs/files_elements.js
index 31dcdaef6105459ab2c82fa60cc5a1b6d03703f2..7e65d2b53ec3311ba1fd8577861a20b65a5df942 100644
--- a/ui/compositor/reflector.cc
+++ b/ui/file_manager/externs/files_elements.js
@@ -2,11 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "ui/compositor/reflector.h"
-
-namespace ui {
-
-Reflector::~Reflector() {
+/**
+ * @constructor
+ * @struct
+ * @extends {HTMLElement}
+ */
+function FilesToggleRipple() {
+  /**
+   * @type {boolean}
+   */
+  this.activated;

[fukino, 2015/06/12 06:28:48]

Could you use the same format as other externs file?
i.e.

/** */
function FilesToggleRipple() {}

/** */
FilesToggleRipple.prototype.activated;

[yawano, 2015/06/16 06:36:40]

Done.

 }
-
-}  // namespace ui