Disable download for overlay panel content

content/browser/renderer_host/render_view_host_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/renderer_host/render_view_host_impl.h"
 
 #include <set>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 547 matching lines @@
   const std::string plugin_mixed_content_status =
       base::FieldTrialList::FindFullName("PluginMixedContentStatus");
   prefs.block_mixed_plugin_content =
       plugin_mixed_content_status == "BlockableMixedContent";
 
   prefs.v8_cache_options = GetV8CacheOptions();
 
   prefs.user_gesture_required_for_presentation = !command_line.HasSwitch(
       switches::kDisableGestureRequirementForPresentation);
 
+  if (delegate_ && delegate_->HideDownloadUI())
+    prefs.hide_download_ui = true;
+
   GetContentClient()->browser()->OverrideWebkitPrefs(this, &prefs);
   return prefs;
 }
 
 void RenderViewHostImpl::ClosePage() {
   is_waiting_for_close_ack_ = true;
   GetWidget()->StartHangMonitorTimeout(
       TimeDelta::FromMilliseconds(kUnloadTimeoutMS),
       blink::WebInputEvent::Undefined,
       RendererUnresponsiveType::RENDERER_UNRESPONSIVE_CLOSE_PAGE);
@@ skipping 737 matching lines @@
     // Note: We are using the origin URL provided by the sender here. It may be
     // different from the receiver's.
     file_system_file.url =
         GURL(storage::GetIsolatedFileSystemRootURIString(
                  file_system_url.origin(), filesystem_id, std::string())
                  .append(register_name));
   }
 }
 
 }  // namespace content