Linux: don't try and read shmmax in the sandbox.

base/sys_info.h

 // Copyright (c) 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.
 
 #ifndef BASE_SYS_INFO_H_
 #define BASE_SYS_INFO_H_
 
 #include "base/basictypes.h"
 
 #include <string>
@@ skipping 47 matching lines @@
   // width and height parameters.
   static void GetPrimaryDisplayDimensions(int* width, int* height);
 
   // Return the number of displays.
   static int DisplayCount();
 
   // Return the smallest amount of memory (in bytes) which the VM system will
   // allocate.
   static size_t VMAllocationGranularity();
 
+#if defined(OS_LINUX)
+  // Returns the maximum SysV shared memory segment size.
+  static size_t MaxSharedMemorySize();
+#endif
+
 #if defined(OS_CHROMEOS)
   // Returns the name of the version entry we wish to look up in the
   // Linux Standard Base release information file.
   static std::string GetLinuxStandardBaseVersionKey();
 
   // Parses /etc/lsb-release to get version information for Google Chrome OS.
   // Declared here so it can be exposed for unit testing.
   static void ParseLsbRelease(const std::string& lsb_release,
                               int32 *major_version,
                               int32 *minor_version,
                               int32 *bugfix_version);
 #endif
 };
 
 }  // namespace base
 
 #endif  // BASE_SYS_INFO_H_