Update sandbox/linux from upstream

sandbox/linux/tests/unit_tests.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 <fcntl.h>
 #include <poll.h>
 #include <signal.h>
 #include <stdio.h>
 #include <sys/resource.h>
 #include <sys/types.h>
@@ skipping 13 matching lines @@
 #if !defined(POLLRDHUP)
 #define POLLRDHUP 0x2000
 #endif
 
 namespace {
 std::string TestFailedMessage(const std::string& msg) {
   return msg.empty() ? std::string() : "Actual test failure: " + msg;
 }
 
 int GetSubProcessTimeoutTimeInSeconds() {
-  // Previously 10s, but that timed out (just) on Chromecast.
-  return 12;
+#ifdef NDEBUG
+  // Chromecast build lab devices need this much time to complete.
+  // They only run in release.
+  return 30;
+#else
+  // Want a shorter timeout than test runner to get a useful callstack
+  // in debug.
+  return 10;
+#endif
 }
 
 // Returns the number of threads of the current process or -1.
 int CountThreads() {
   struct stat task_stat;
   int task_d = stat("/proc/self/task", &task_stat);
   // task_stat.st_nlink should be the number of tasks + 2 (accounting for
   // "." and "..".
   if (task_d != 0 || task_stat.st_nlink < 3)
     return -1;
@@ skipping 299 matching lines @@
   fflush(stderr);
   _exit(kExitWithAssertionFailure);
 }
 
 void UnitTests::IgnoreThisTest() {
   fflush(stderr);
   _exit(kIgnoreThisTest);
 }
 
 }  // namespace