Wire up process launch error codes.

components/nacl/broker/nacl_broker_listener.cc

Index: components/nacl/broker/nacl_broker_listener.cc
diff --git a/components/nacl/broker/nacl_broker_listener.cc b/components/nacl/broker/nacl_broker_listener.cc
index 2704695a4bc3a1e038e969943f008a920962b59c..e7fa3d1a530775653b1c7e91c980245da3dbddb7 100644
--- a/components/nacl/broker/nacl_broker_listener.cc
+++ b/components/nacl/broker/nacl_broker_listener.cc
@@ -109,9 +109,11 @@ void NaClBrokerListener::OnLaunchLoaderThroughBroker(
     cmd_line->AppendSwitchASCII(switches::kProcessChannelID,
                                 loader_channel_id);
 
-    base::Process loader_process = content::StartSandboxedProcess(
-        this, cmd_line, base::HandlesToInheritVector());
-    if (loader_process.IsValid()) {
+    base::Process loader_process;
+    sandbox::ResultCode result = content::StartSandboxedProcess(
+        this, cmd_line, base::HandlesToInheritVector(), &loader_process);
+
+    if (result == sandbox::SBOX_ALL_OK) {
       // Note: PROCESS_DUP_HANDLE is necessary here, because:
       // 1) The current process is the broker, which is the loader's parent.
       // 2) The browser is not the loader's parent, and so only gets the