Linux sandbox: more paranoid checks

content/zygote/zygote_main_linux.cc

Index: content/zygote/zygote_main_linux.cc
diff --git a/content/zygote/zygote_main_linux.cc b/content/zygote/zygote_main_linux.cc
index ed7fd06f3f13b8e1cade63ac31142a88e746d0dd..852be26c2f9dee36ce5770f2b1648698c80e476b 100644
--- a/content/zygote/zygote_main_linux.cc
+++ b/content/zygote/zygote_main_linux.cc
@@ -456,10 +456,7 @@ bool ZygoteMain(const MainFunctionParams& params,
 
   LinuxSandbox* linux_sandbox = LinuxSandbox::GetInstance();
   // This will pre-initialize the various sandboxes that need it.
-  // There need to be a corresponding call to PreinitializeSandboxFinish()
-  // for each new process, this will be done in the Zygote child, once we know
-  // our process type.
-  linux_sandbox->PreinitializeSandboxBegin();
+  linux_sandbox->PreinitializeSandbox();
 
   sandbox::SetuidSandboxClient* setuid_sandbox =
       linux_sandbox->setuid_sandbox_client();