Prevent reloading the PDF embedded in the print preview.

chrome/browser/renderer_context_menu/render_view_context_menu.cc

Index: chrome/browser/renderer_context_menu/render_view_context_menu.cc
diff --git a/chrome/browser/renderer_context_menu/render_view_context_menu.cc b/chrome/browser/renderer_context_menu/render_view_context_menu.cc
index b8c4267dde9ccdee0edd7824b44738fda7bb1667..d90554841fdd5aa629b7f9f58ede9a36cee54ce4 100644
--- a/chrome/browser/renderer_context_menu/render_view_context_menu.cc
+++ b/chrome/browser/renderer_context_menu/render_view_context_menu.cc
@@ -1600,7 +1600,8 @@ bool RenderViewContextMenu::IsCommandIdEnabled(int id) const {
       return IsSavePageEnabled();
 
     case IDC_CONTENT_CONTEXT_RELOADFRAME:
-      return params_.frame_url.is_valid();
+      return params_.frame_url.is_valid() &&
+             params_.frame_url.GetOrigin() != chrome::kChromeUIPrintURL;
 
     case IDC_CONTENT_CONTEXT_UNDO:
       return !!(params_.edit_flags & WebContextMenuData::CanUndo);