Add support for scout to 'ext' param when creating SafeBrowsing ping URLs.

chrome/browser/safe_browsing/protocol_manager_helper.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/safe_browsing/protocol_manager_helper.h"
 
 #ifndef NDEBUG
 #include "base/base64.h"
 #endif
 #include "base/environment.h"
@@ skipping 48 matching lines @@
   return url;
 }
 
 // static
 std::string SafeBrowsingProtocolManagerHelper::ComposeUrl(
     const std::string& prefix,
     const std::string& method,
     const std::string& client_name,
     const std::string& version,
     const std::string& additional_query,
-    bool is_extended_reporting) {
+    ExtendedReportingLevel reporting_level) {
   std::string url =
       ComposeUrl(prefix, method, client_name, version, additional_query);
-  if (is_extended_reporting) {
-    url.append("&ext=1");
-  } else {
-    url.append("&ext=0");
-  }
+  url.append(base::StringPrintf("&ext=%d", reporting_level));
   return url;
 }
 
 }  // namespace safe_browsing