Ok, here is a different approach at this change.

chrome/common/child_process_logging_linux.cc

Index: chrome/common/child_process_logging_linux.cc
diff --git a/chrome/common/child_process_logging_linux.cc b/chrome/common/child_process_logging_linux.cc
index 9b51303592dbd79d360a6c9c7d0a8d9cc1d89afa..0b54010e913fda0e3323ca0caee95a7ae99a72e5 100644
--- a/chrome/common/child_process_logging_linux.cc
+++ b/chrome/common/child_process_logging_linux.cc
@@ -31,4 +31,8 @@ void SetClientId(const std::string& client_id) {
   std::wstring wstr = ASCIIToWide(str);
   GoogleUpdateSettings::SetMetricsId(wstr);
 }
+
+void SetActiveExtensions(const std::vector<std::string> extension_ids) {
+  // TODO(port)
+}
 }  // namespace child_process_logging