devtools: Make it possible to override the navigation referrer

content/browser/devtools/protocol/page_handler.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 "content/browser/devtools/protocol/page_handler.h"
 
 #include <string>
 
 #include "base/base64.h"
 #include "base/bind.h"
@@ skipping 210 matching lines @@
                                              : ReloadType::NORMAL,
                                          false);
     return Response::OK();
   } else {
     // Handle reload in renderer except for crashed and view source mode.
     return Response::FallThrough();
   }
 }
 
 Response PageHandler::Navigate(const std::string& url,
+                               Maybe<std::string> referrer,
                                Page::FrameId* frame_id) {
   GURL gurl(url);
   if (!gurl.is_valid())
     return Response::Error("Cannot navigate to invalid URL");
 
   WebContentsImpl* web_contents = GetWebContents();
   if (!web_contents)
     return Response::InternalError();
 
-  web_contents->GetController()
-      .LoadURL(gurl, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
+  web_contents->GetController().LoadURL(
+      gurl,
+      Referrer(GURL(referrer.fromMaybe("")), blink::WebReferrerPolicyDefault),
+      ui::PAGE_TRANSITION_TYPED, std::string());
   return Response::FallThrough();
 }
 
 Response PageHandler::GetNavigationHistory(
     int* current_index,
     std::unique_ptr<NavigationEntries>* entries) {
   WebContentsImpl* web_contents = GetWebContents();
   if (!web_contents)
     return Response::InternalError();
 
@@ skipping 333 matching lines @@
 Response PageHandler::StopLoading() {
   WebContentsImpl* web_contents = GetWebContents();
   if (!web_contents)
     return Response::InternalError();
   web_contents->Stop();
   return Response::OK();
 }
 
 }  // namespace protocol
 }  // namespace content