Allows browser tests to run with recent change

chrome/app/chrome_dll_main.cc

 // Copyright (c) 2009 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.
 
 // TODO(port): the ifdefs in here are a first step towards trying to determine
 // the correct abstraction for all the OS functionality required at this
 // stage of process initialization. It should not be taken as a final
 // abstraction.
 
 #include "build/build_config.h"
@@ skipping 381 matching lines @@
 
 #if defined(OS_WIN)
 DLLEXPORT int __cdecl ChromeMain(HINSTANCE instance,
                                  sandbox::SandboxInterfaceInfo* sandbox_info,
                                  TCHAR* command_line) {
 #elif defined(OS_POSIX)
 int ChromeMain(int argc, char** argv) {
 #endif
 #if defined(OS_CHROMEOS)
   // Output our start times.
-  system("set -o noclobber ; cat /proc/uptime > /tmp/uptime-chrome-main");
-  system("set -o noclobber ; cat /sys/block/sda/stat > /tmp/disk-chrome-main");
+  system("if [ ! -f /tmp/uptime-chrome-main ]; "
+         "then cat /proc/uptime > /tmp/uptime-chrome-main ; fi");
+  system("if [ ! -f /tmp/disk-chrome-main ]; "
+         "then cat /sys/block/sda/stat > /tmp/disk-chrome-main ; fi");
 #endif
 #if defined(OS_MACOSX)
   // TODO(mark): Some of these things ought to be handled in chrome_exe_main.mm.
   // Under the current architecture, nothing in chrome_exe_main can rely
   // directly on chrome_dll code on the Mac, though, so until some of this code
   // is refactored to avoid such a dependency, it lives here.  See also the
   // TODO(mark) below at InitCrashReporter() and DestructCrashReporter().
   base::EnableTerminationOnHeapCorruption();
   base::EnableTerminationOnOutOfMemory();
 #endif  // OS_MACOSX
@@ skipping 419 matching lines @@
 
   logging::CleanupChromeLogging();
 
 #if defined(OS_MACOSX) && defined(GOOGLE_CHROME_BUILD)
   // TODO(mark): See the TODO(mark) above at InitCrashReporter.
   DestructCrashReporter();
 #endif  // OS_MACOSX && GOOGLE_CHROME_BUILD
 
   return rv;
 }