AdjustRendererOOMScore isn't execute in linux.

content/browser/child_process_launcher.cc

Index: content/browser/child_process_launcher.cc
diff --git a/content/browser/child_process_launcher.cc b/content/browser/child_process_launcher.cc
index 3869c6841bb060c0ff330d4704e186f71738120a..86a1a617b58c415ca96dd44d4d471042afcd2d02 100644
--- a/content/browser/child_process_launcher.cc
+++ b/content/browser/child_process_launcher.cc
@@ -267,6 +267,10 @@ class ChildProcessLauncher::Context
       base::LaunchOptions options;
       options.environ = env;
       options.fds_to_remap = &fds_to_map;
+#if defined(OS_LINUX)
+      options.allow_new_privs = ZygoteHostImpl::GetInstance()->

[jln (very slow on Chromium), 2014/04/24 00:17:59]

You are doing this for the GPU process aren't you?

The GPU process is not going through the setuid sandbox, so this is incorrect in
any case.

Moreover, I don't see why the GPU process could ever need this.

+          UsingSUIDSandbox();
+#endif
 
 #if defined(OS_MACOSX)
       // Hold the MachBroker lock for the duration of LaunchProcess. The child