Add metrics for DHCP WPAD feature.

content/browser/renderer_host/resource_dispatcher_host.cc

Index: content/browser/renderer_host/resource_dispatcher_host.cc
diff --git a/content/browser/renderer_host/resource_dispatcher_host.cc b/content/browser/renderer_host/resource_dispatcher_host.cc
index b5b5a897bc03487dc08aaf26b00651a55026faa1..43dacb2d7ceeff95a848e54cd46ba71b63e6bd28 100644
--- a/content/browser/renderer_host/resource_dispatcher_host.cc
+++ b/content/browser/renderer_host/resource_dispatcher_host.cc
@@ -211,17 +211,6 @@ void PopulateResourceResponse(net::URLRequest* request,
       &response->response_head.appcache_manifest_url);
 }
 
-// Returns a list of all the possible error codes from the network module.
-// Note that the error codes are all positive (since histograms expect positive
-// sample values).
-std::vector<int> GetAllNetErrorCodes() {
-  std::vector<int> all_error_codes;
-#define NET_ERROR(label, value) all_error_codes.push_back(-(value));
-#include "net/base/net_error_list.h"
-#undef NET_ERROR
-  return all_error_codes;
-}
-
 void RemoveDownloadFileFromChildSecurityPolicy(int child_id,
                                                const FilePath& path) {
   ChildProcessSecurityPolicy::GetInstance()->RevokeAllPermissionsForFile(
@@ -1612,7 +1601,7 @@ void ResourceDispatcherHost::OnResponseCompleted(net::URLRequest* request) {
       request->status().os_error() != net::ERR_ABORTED) {
     UMA_HISTOGRAM_CUSTOM_ENUMERATION("Net.ErrorCodesForMainFrame",
                                      -request->status().os_error(),
-                                     GetAllNetErrorCodes());
+                                     net::GetAllErrorCodesForUma());
   }
 
   std::string security_info;