Always enable copy-link-address in context menu.

chrome/browser/renderer_host/render_view_host.cc

Index: chrome/browser/renderer_host/render_view_host.cc
===================================================================
--- chrome/browser/renderer_host/render_view_host.cc	(revision 14202)
+++ chrome/browser/renderer_host/render_view_host.cc	(working copy)
@@ -1048,6 +1048,8 @@
   const int renderer_id = process()->pid();
   RendererSecurityPolicy* policy = RendererSecurityPolicy::GetInstance();
 
+  // We don't validate |unfiltered_link_url| so that this field can be used
+  // when users want to copy the original link URL.
   FilterURL(policy, renderer_id, &validated_params.link_url);
   FilterURL(policy, renderer_id, &validated_params.image_url);
   FilterURL(policy, renderer_id, &validated_params.page_url);