[Webapp Refactor] Clean up remoting.Clipboard.

remoting/webapp/crd/js/client_plugin.js

Index: remoting/webapp/crd/js/client_plugin.js
diff --git a/remoting/webapp/crd/js/client_plugin.js b/remoting/webapp/crd/js/client_plugin.js
index e8b3f8d9a9525ebfa3672b8141d52e50198e3c38..31bb60e76a398a393931719337216618d8fb3eb9 100644
--- a/remoting/webapp/crd/js/client_plugin.js
+++ b/remoting/webapp/crd/js/client_plugin.js
@@ -157,8 +157,14 @@ remoting.ClientPlugin.prototype.setConnectionEventHandler =
  *     URL encoding the mouse cursor; the second and third parameters are
  *     the cursor hotspot's x- and y-coordinates, respectively.
  */
-remoting.ClientPlugin.prototype.setMouseCursorHandler =
-    function(handler) {};
+remoting.ClientPlugin.prototype.setMouseCursorHandler = function(handler) {};
+
+/**
+ * @param {function(string, string):void} handler Callback for processing
+ *    clipboard data injected from the host. The first parameter is the mime
+ *    type and the second parameter is the actual data.
+ */
+remoting.ClientPlugin.prototype.setClipboardHandler = function(handler) {};
 
 /**
  * @param {function({rects:Array<Array<number>>}):void|null} handler Callback