Make startup_tests build and run on Linux (except reference tests).

base/process_util_posix.cc

 // Copyright (c) 2006-2008 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 <dirent.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <signal.h>
 #include <stdlib.h>
 #include <sys/resource.h>
@@ skipping 230 matching lines @@
     return WIFEXITED(status);
   else
     return false;
 }
 
 bool CrashAwareSleep(ProcessHandle handle, int wait_milliseconds) {
   int status = WaitpidWithTimeout(handle, wait_milliseconds);
   if (status != -1)
     return !(WIFEXITED(status) || WIFSIGNALED(status));
   else
-    return false;
+    return true;
 }
 
 namespace {
 
 int64 TimeValToMicroseconds(const struct timeval& tv) {
   return tv.tv_sec * kMicrosecondsPerSecond + tv.tv_usec;
 }
 
 }
 
@@ skipping 86 matching lines @@
                       const ProcessFilter* filter) {
   bool exited_cleanly =
       WaitForProcessesToExit(executable_name, wait_milliseconds,
                            filter);
   if (!exited_cleanly)
     KillProcesses(executable_name, exit_code, filter);
   return exited_cleanly;
 }
 
 }  // namespace base