Change the ChromiumPasteboard to have a notion of an alternate clipboard...

webkit/glue/webview_delegate.h

Index: webkit/glue/webview_delegate.h
===================================================================
--- webkit/glue/webview_delegate.h	(revision 25640)
+++ webkit/glue/webview_delegate.h	(working copy)
@@ -719,14 +719,6 @@
     return NULL;
   }
 
-  // Selection clipboard -----------------------------------------------------
-
-  // Request the text on the selection clipboard be sent back to the webview
-  // so it can be inserted into the current focus area. In response to this call
-  // the delegate should get the text and send it to the WebView via
-  // InsertText().
-  virtual void PasteFromSelectionClipboard() { }
-
   // Editor Client -----------------------------------------------------------
 
   // Returns true if the word is spelled correctly. The word may begin or end