Make original_response_headers parameter of NetworkDelegate::OnHeadersReceived const

chrome/browser/extensions/api/web_request/web_request_api.h

 // 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_API_WEB_REQUEST_WEB_REQUEST_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_WEB_REQUEST_WEB_REQUEST_API_H_
 
 #include <list>
 #include <map>
 #include <set>
@@ skipping 163 matching lines @@
   // and |override_response_headers| are owned by a URLRequestJob. They are
   // guaranteed to be valid until |callback| is called or OnURLRequestDestroyed
   // is called (whatever comes first).
   // Do not modify |original_response_headers| directly but write new ones
   // into |override_response_headers|.
   int OnHeadersReceived(
       void* profile,
       ExtensionInfoMap* extension_info_map,
       net::URLRequest* request,
       const net::CompletionCallback& callback,
-      net::HttpResponseHeaders* original_response_headers,
+      const net::HttpResponseHeaders* original_response_headers,
       scoped_refptr<net::HttpResponseHeaders>* override_response_headers);
 
   // Dispatches the OnAuthRequired event to any extensions whose filters match
   // the given request. If the listener is not registered as "blocking", then
   // AUTH_REQUIRED_RESPONSE_OK is returned. Otherwise,
   // AUTH_REQUIRED_RESPONSE_IO_PENDING is returned and |callback| will be
   // invoked later.
   net::NetworkDelegate::AuthRequiredResponse OnAuthRequired(
                      void* profile,
                      ExtensionInfoMap* extension_info_map,
@@ skipping 144 matching lines @@
   // modifications to the request that result from WebRequestActions as
   // deltas in |blocked_requests_|. |original_response_headers| should only be
   // set for the OnHeadersReceived stage and NULL otherwise. Returns whether any
   // deltas were generated.
   bool ProcessDeclarativeRules(
       void* profile,
       ExtensionInfoMap* extension_info_map,
       const std::string& event_name,
       net::URLRequest* request,
       extensions::RequestStage request_stage,
-      net::HttpResponseHeaders* original_response_headers);
+      const net::HttpResponseHeaders* original_response_headers);
 
   // Called when the RulesRegistry is ready to unblock a request that was
   // waiting for said event.
   void OnRulesRegistryReady(
       void* profile,
       const std::string& event_name,
       uint64 request_id,
       extensions::RequestStage request_stage);
 
   // Sets the flag that |event_type| has been signaled for |request_id|.
@@ skipping 82 matching lines @@
   virtual void OnQuotaExceeded(const std::string& error) OVERRIDE;
   virtual bool RunImpl() OVERRIDE;
 };
 
 // Send updates to |host| with information about what webRequest-related
 // extensions are installed.
 // TODO(mpcomplete): remove. http://crbug.com/100411
 void SendExtensionWebRequestStatusToHost(content::RenderProcessHost* host);
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_WEB_REQUEST_WEB_REQUEST_API_H_