PlzNavigate: support NavigationThrottle::WillProcessResponse

content/browser/loader/navigation_url_loader.h

 // 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.
 
 #ifndef CONTENT_BROWSER_LOADER_NAVIGATION_URL_LOADER_H_
 #define CONTENT_BROWSER_LOADER_NAVIGATION_URL_LOADER_H_
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/common/content_export.h"
@@ skipping 29 matching lines @@
 
   // For testing purposes; sets the factory for use in testing.
   static void SetFactoryForTesting(NavigationURLLoaderFactory* factory);
 
   virtual ~NavigationURLLoader() {}
 
   // Called in response to OnRequestRedirected to continue processing the
   // request.
   virtual void FollowRedirect() = 0;
 
+  // Called in response to OnResponseStarted to process the response.
+  virtual void ProceedWithResponse() = 0;
+
  protected:
   NavigationURLLoader() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(NavigationURLLoader);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_LOADER_NAVIGATION_URL_LOADER_H_