Provide WebContents::CreateParams to tab helpers.

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 2273 matching lines @@
     }
     // Save the created window associated with the route so we can show it
     // later.
     DCHECK_NE(MSG_ROUTING_NONE, main_frame_widget_route_id);
     pending_contents_[std::make_pair(
         render_process_id, main_frame_widget_route_id)] = new_contents;
     AddDestructionObserver(new_contents);
   }
 
   if (delegate_) {
-    delegate_->WebContentsCreated(this, render_process_id,
-                                  opener->GetRoutingID(), params.frame_name,
-                                  params.target_url, new_contents);
+    delegate_->WebContentsCreated(
+        this, render_process_id, opener->GetRoutingID(), params.frame_name,
+        params.target_url, new_contents, create_params);
   }
 
   if (opener) {
     for (auto& observer : observers_) {
       observer.DidOpenRequestedURL(new_contents, opener, params.target_url,
                                    params.referrer, params.disposition,
                                    ui::PAGE_TRANSITION_LINK,
                                    false,  // started_from_context_menu
                                    true);  // renderer_initiated
     }
@@ skipping 3331 matching lines @@
     RenderViewHost* render_view_host = RenderViewHost::From(render_widget_host);
     if (!render_view_host)
       continue;
     render_view_host_set.insert(render_view_host);
   }
   for (RenderViewHost* render_view_host : render_view_host_set)
     render_view_host->OnWebkitPreferencesChanged();
 }
 
 }  // namespace content