update obsolete code.google.com documentation links

components/nacl/loader/nacl_main_platform_delegate_linux.cc

Index: components/nacl/loader/nacl_main_platform_delegate_linux.cc
diff --git a/components/nacl/loader/nacl_main_platform_delegate_linux.cc b/components/nacl/loader/nacl_main_platform_delegate_linux.cc
index 8e7be400b8bc838d983b74522e84c6b3b8b8ca21..a59245412a58b1a791273858aa051f78aa231902 100644
--- a/components/nacl/loader/nacl_main_platform_delegate_linux.cc
+++ b/components/nacl/loader/nacl_main_platform_delegate_linux.cc
@@ -7,7 +7,7 @@
 void NaClMainPlatformDelegate::EnableSandbox(
     const content::MainFunctionParams& parameters) {
   // The setuid sandbox is started in the zygote process: zygote_main_linux.cc
-  // http://code.google.com/p/chromium/wiki/LinuxSUIDSandbox
+  // https://chromium.googlesource.com/chromium/src/+/master/docs/linux_suid_sandbox.md
   //
   // The seccomp sandbox is started in the renderer.
   // http://code.google.com/p/seccompsandbox/