Implemented a "Last Updated" field for the about page of Chrome OS.

base/sys_info.h

Index: base/sys_info.h
diff --git a/base/sys_info.h b/base/sys_info.h
index f3677d6009f0e67147642c54a470fb3c97a3bde2..b74f1ac679cdae0a860527f02d291de4f9c0a6c2 100644
--- a/base/sys_info.h
+++ b/base/sys_info.h
@@ -8,6 +8,8 @@
 
 #include "base/base_export.h"
 #include "base/basictypes.h"
+#include "base/file_path.h"
+#include "base/time.h"
 
 #include <string>
 
@@ -61,7 +63,7 @@ class BASE_EXPORT SysInfo {
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
   // Returns the maximum SysV shared memory segment size.
   static size_t MaxSharedMemorySize();
-#endif
+#endif // defined(OS_POSIX) && !defined(OS_MACOSX)
 
 #if defined(OS_CHROMEOS)
   // Returns the name of the version entry we wish to look up in the
@@ -74,7 +76,10 @@ class BASE_EXPORT SysInfo {
                               int32* major_version,
                               int32* minor_version,
                               int32* bugfix_version);
-#endif
+
+  // Returns the path to the lsb-release file.
+  static FilePath GetLsbReleaseFilePath();
+#endif // defined(OS_CHROMEOS)
 };
 
 }  // namespace base