Do not suppress referrers for '<a ... rel="noopener">'.

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 <stddef.h>
 
 #include <cmath>
 #include <utility>
@@ skipping 2052 matching lines @@
     // When the opener is suppressed, the original renderer cannot access the
     // new window.  As a result, we need to show and navigate the window here.
     bool was_blocked = false;
     if (delegate_) {
       gfx::Rect initial_rect;
       delegate_->AddNewContents(
           this, new_contents, params.disposition, initial_rect,
           params.user_gesture, &was_blocked);
     }
     if (!was_blocked) {
-      OpenURLParams open_params(params.target_url,
-                                Referrer(),
-                                CURRENT_TAB,
+      OpenURLParams open_params(params.target_url, params.referrer, CURRENT_TAB,

[Mike West, 2016/06/10 08:26:06]

This is the only behavioral change in this patch; the WebKit bits are just inert
refactoring so that we're not passing the data around as part of
'FrameLoadRequest' and as distinct booleans.

Since we're already checking the referrer state in
'FrameLoader::setReferrerForFrameRequest', we can simply rely on Blink to send
the right information for 'noreferrer', rather than conflating the opener
behavior and the referrer behavior here.

                                 ui::PAGE_TRANSITION_LINK,
                                 true /* is_renderer_initiated */);
       open_params.user_gesture = params.user_gesture;
 
       if (delegate_ && !is_guest &&
           !delegate_->ShouldResumeRequestsForCreatedWindow()) {
         // We are in asynchronous add new contents path, delay opening url
         new_contents->delayed_open_url_params_.reset(
             new OpenURLParams(open_params));
       } else {
@@ skipping 3044 matching lines @@
   for (RenderViewHost* render_view_host : render_view_host_set)
     render_view_host->OnWebkitPreferencesChanged();
 }
 
 void WebContentsImpl::SetJavaScriptDialogManagerForTesting(
     JavaScriptDialogManager* dialog_manager) {
   dialog_manager_ = dialog_manager;
 }
 
 }  // namespace content