AdjustRendererOOMScore isn't execute in linux.

content/browser/child_process_launcher.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/child_process_launcher.h"
 
 #include <utility>  // For std::pair.
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 249 matching lines @@
         fds_to_map.push_back(std::make_pair(
             sandbox_fd,
             GetSandboxFD()));
       }
 #endif  // defined(OS_MACOSX)
 
       // Actually launch the app.
       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
       // will send its task port to the parent almost immediately after startup.
       // The Mach message will be delivered to the parent, but updating the
       // record of the launch will wait until after the placeholder PID is
       // inserted below. This ensures that while the child process may send its
       // port to the parent prior to the parent leaving LaunchProcess, the
       // order in which the record in MachBroker is updated is correct.
       MachBroker* broker = MachBroker::GetInstance();
@@ skipping 222 matching lines @@
           GetHandle(), background));
 }
 
 void ChildProcessLauncher::SetTerminateChildOnShutdown(
     bool terminate_on_shutdown) {
   if (context_.get())
     context_->set_terminate_child_on_shutdown(terminate_on_shutdown);
 }
 
 }  // namespace content