Make original_response_headers parameter of NetworkDelegate::OnHeadersReceived const

chrome/browser/extensions/api/declarative_webrequest/webrequest_action.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 "chrome/browser/extensions/api/declarative_webrequest/webrequest_action.h"
 
 #include <limits>
 
 #include "base/lazy_instance.h"
 #include "base/logging.h"
@@ skipping 764 matching lines @@
 WebRequestAddResponseHeaderAction::GetType() const {
   return WebRequestAction::ACTION_ADD_RESPONSE_HEADER;
 }
 
 LinkedPtrEventResponseDelta
 WebRequestAddResponseHeaderAction::CreateDelta(
     const WebRequestRule::RequestData& request_data,
     const std::string& extension_id,
     const base::Time& extension_install_time) const {
   CHECK(request_data.stage & GetStages());
-  net::HttpResponseHeaders* headers =
+  const net::HttpResponseHeaders* headers =
       request_data.original_response_headers;
   if (!headers)
     return LinkedPtrEventResponseDelta(NULL);
 
   // Don't generate the header if it exists already.
   if (headers->HasHeaderValue(name_, value_))
     return LinkedPtrEventResponseDelta(NULL);
 
   LinkedPtrEventResponseDelta result(
       new helpers::EventResponseDelta(extension_id, extension_install_time));
@@ skipping 24 matching lines @@
 WebRequestRemoveResponseHeaderAction::GetType() const {
   return WebRequestAction::ACTION_REMOVE_RESPONSE_HEADER;
 }
 
 LinkedPtrEventResponseDelta
 WebRequestRemoveResponseHeaderAction::CreateDelta(
     const WebRequestRule::RequestData& request_data,
     const std::string& extension_id,
     const base::Time& extension_install_time) const {
   CHECK(request_data.stage & GetStages());
-  net::HttpResponseHeaders* headers =
+  const net::HttpResponseHeaders* headers =
       request_data.original_response_headers;
   if (!headers)
     return LinkedPtrEventResponseDelta(NULL);
 
   LinkedPtrEventResponseDelta result(
       new helpers::EventResponseDelta(extension_id, extension_install_time));
   void* iter = NULL;
   std::string current_value;
   while (headers->EnumerateHeader(&iter, name_, &current_value)) {
     if (has_value_ &&
@@ skipping 104 matching lines @@
   CHECK(request_data.stage & GetStages());
   LinkedPtrEventResponseDelta result(
       new extension_web_request_api_helpers::EventResponseDelta(
           extension_id, extension_install_time));
   result->response_cookie_modifications.push_back(
       response_cookie_modification_);
   return result;
 }
 
 }  // namespace extensions