Update NavigationHandleImpl#GetResponseHeaders method.

content/browser/frame_host/navigation_handle_impl.h

 // Copyright 2015 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.
 
 #ifndef CONTENT_BROWSER_FRAME_HOST_NAVIGATION_HANDLE_IMPL_H_
 #define CONTENT_BROWSER_FRAME_HOST_NAVIGATION_HANDLE_IMPL_H_
 
 #include "content/public/browser/navigation_handle.h"
 
 #include <stddef.h>
@@ skipping 94 matching lines @@
       bool new_is_external_protocol) override;
 
   NavigatorDelegate* GetDelegate() const;
 
   // Returns the response headers for the request. This can only be accessed
   // after a redirect was encountered or after the the navigation is ready to
   // commit. It should not be modified, as modifications will not be reflected
   // in the network stack.
   const net::HttpResponseHeaders* GetResponseHeaders();
 
+  // Returns whether response headers are currently available for the request.
+ bool HasResponseHeaders() const;

[clamy, 2016/02/09 10:42:40]

nit: wrong indentation

[Donn Denman, 2016/02/10 01:05:05]

Acknowledged.

+
   void set_net_error_code(net::Error net_error_code) {
     net_error_code_ = net_error_code;
   }
 
   // Returns whether the navigation is currently being transferred from one
   // RenderFrameHost to another. In particular, a DidStartProvisionalLoad IPC
   // for the navigation URL, received in the new RenderFrameHost, should not
   // indicate the start of a new navigation in that case.
   bool is_transferring() const { return is_transferring_; }
   void set_is_transferring(bool is_transferring) {
@@ skipping 141 matching lines @@
   // Manages the lifetime of a pre-created ServiceWorkerProviderHost until a
   // corresponding ServiceWorkerNetworkProvider is created in the renderer.
   scoped_ptr<ServiceWorkerNavigationHandle> service_worker_handle_;
 
   DISALLOW_COPY_AND_ASSIGN(NavigationHandleImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_NAVIGATION_HANDLE_IMPL_H_