PDF: Set a referrer when performing a SaveAs operation.

components/pdf/renderer/pepper_pdf_host.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 "components/pdf/renderer/pepper_pdf_host.h"
 
 #include "components/pdf/common/pdf_messages.h"
 #include "content/public/common/referrer.h"
 #include "content/public/renderer/pepper_plugin_instance.h"
 #include "content/public/renderer/render_thread.h"
@@ skipping 135 matching lines @@
 }
 
 int32_t PepperPDFHost::OnHostMsgSaveAs(
     ppapi::host::HostMessageContext* context) {
   content::PepperPluginInstance* instance =
       host_->GetPluginInstance(pp_instance());
   if (!instance)
     return PP_ERROR_FAILED;
   GURL url = instance->GetPluginURL();
   content::RenderView* render_view = instance->GetRenderView();
-  blink::WebLocalFrame* frame =
-      render_view->GetWebView()->mainFrame()->toWebLocalFrame();
-  content::Referrer referrer = content::Referrer::SanitizeForRequest(
-      url, content::Referrer(frame->document().url(),
-                             frame->document().referrerPolicy()));
+  content::Referrer referrer;
+  referrer.url = url;

[jochen (gone - plz use gerrit), 2015/12/09 15:41:33]

can you still use the document's referrerPolicy?

[Lei Zhang, 2015/12/09 17:21:15]

In my limited testing, the document's referrer policy is always 1, AKA
WebReferrerPolicyDefault, which is the same as the value set by the Referrer.
But if you really prefer the document's policy, let me know.

[jochen (gone - plz use gerrit), 2015/12/10 15:34:05]

hum, yeah.

so in the future, we'll be able to set the referrer policy via http headers. But
I guess the document() is still just going to be the extension.

can you set the policy explicitly to WebReferrerPolicyDefault then? That'll make
it easier to spot this place in the future

[Lei Zhang, 2015/12/10 21:57:38]

Done.

+  referrer = content::Referrer::SanitizeForRequest(url, referrer);
   render_view->Send(
       new PDFHostMsg_PDFSaveURLAs(render_view->GetRoutingID(), url, referrer));
   return PP_OK;
 }
 
 int32_t PepperPDFHost::OnHostMsgSetSelectedText(
     ppapi::host::HostMessageContext* context,
     const base::string16& selected_text) {
   content::PepperPluginInstance* instance =
       host_->GetPluginInstance(pp_instance());
   if (!instance)
     return PP_ERROR_FAILED;
   instance->SetSelectedText(selected_text);
   return PP_OK;
 }
 
 int32_t PepperPDFHost::OnHostMsgSetLinkUnderCursor(
     ppapi::host::HostMessageContext* context,
     const std::string& url) {
   content::PepperPluginInstance* instance =
       host_->GetPluginInstance(pp_instance());
   if (!instance)
     return PP_ERROR_FAILED;
   instance->SetLinkUnderCursor(url);
   return PP_OK;
 }
 
 }  // namespace pdf