Don't delete g_vlog_info

base/logging.h

Index: base/logging.h
diff --git a/base/logging.h b/base/logging.h
index ae67eacc2aaa3ac129caabfa5726eae006aec062..94a82addfd0de4733e2ee42630edc508134b1ee9 100644
--- a/base/logging.h
+++ b/base/logging.h
@@ -210,6 +210,10 @@ BASE_EXPORT bool BaseInitLoggingImpl(const PathChar* log_file,
 // The default log file is initialized to "debug.log" in the application
 // directory. You probably don't want this, especially since the program
 // directory may not be writable on an enduser's system.
+//
+// This function may be called a second time to re-direct logging (e.g after
+// loging in to a user partition), however it should never be called more than
+// twice.
 inline bool InitLogging(const PathChar* log_file,
                         LoggingDestination logging_dest,
                         LogLockingState lock_log,