Prevent reloading the PDF embedded in the print preview.

chrome/browser/renderer_context_menu/render_view_context_menu.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/renderer_context_menu/render_view_context_menu.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <set>
@@ skipping 1582 matching lines @@
     case IDC_CONTENT_CONTEXT_OPENAVNEWTAB:
       // Currently, a media element can be opened in a new tab iff it can
       // be saved. So rather than duplicating the MediaCanSave flag, we rely
       // on that here.
       return !!(params_.media_flags & WebContextMenuData::MediaCanSave);
 
     case IDC_SAVE_PAGE:
       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);
 
     case IDC_CONTENT_CONTEXT_REDO:
       return !!(params_.edit_flags & WebContextMenuData::CanRedo);
 
     case IDC_CONTENT_CONTEXT_CUT:
       return !!(params_.edit_flags & WebContextMenuData::CanCut);
 
@@ skipping 884 matching lines @@
 void RenderViewContextMenu::PluginActionAt(
     const gfx::Point& location,
     const WebPluginAction& action) {
   source_web_contents_->GetRenderViewHost()->
       ExecutePluginActionAtLocation(location, action);
 }
 
 Browser* RenderViewContextMenu::GetBrowser() const {
   return chrome::FindBrowserWithWebContents(embedder_web_contents_);
 }