Prepending view-source: does not load the source of the userscript.

content/browser/web_contents/web_contents_impl.cc

 // Copyright (c) 2012 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 "content/browser/web_contents/web_contents_impl.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
@@ skipping 201 matching lines @@
   params->transition = entry.GetTransitionType();
   params->state = entry.GetContentState();
   params->navigation_type =
       GetNavigationType(controller.GetBrowserContext(), entry, reload_type);
   params->request_time = base::Time::Now();
   params->extra_headers = entry.extra_headers();
   params->transferred_request_child_id =
       entry.transferred_global_request_id().child_id;
   params->transferred_request_request_id =
       entry.transferred_global_request_id().request_id;
+  // Avoid downloading when in view-source mode.
+  params->allow_download = !entry.IsViewSourceMode();
 
   if (delegate)
     delegate->AddNavigationHeaders(params->url, &params->extra_headers);
 }
 
 }  // namespace
 
 namespace content {
 
 WebContents* WebContents::Create(
@@ skipping 2465 matching lines @@
 void WebContentsImpl::CreateViewAndSetSizeForRVH(RenderViewHost* rvh) {
   RenderWidgetHostView* rwh_view = GetView()->CreateViewForWidget(rvh);
   // Can be NULL during tests.
   if (rwh_view)
     rwh_view->SetSize(GetView()->GetContainerSize());
 }
 
 RenderViewHostImpl* WebContentsImpl::GetRenderViewHostImpl() {
   return static_cast<RenderViewHostImpl*>(GetRenderViewHost());
 }