Update V8 to r5425 as required by WebKit r67178
Change-Id: Ic338e7242d33e5a024bd5978f4a5a3a681af4ebd
diff --git a/src/flag-definitions.h b/src/flag-definitions.h
index a143bcd..a63088d 100644
--- a/src/flag-definitions.h
+++ b/src/flag-definitions.h
@@ -283,7 +283,7 @@
"debugger agent in another process")
DEFINE_bool(debugger_agent, false, "Enable debugger agent")
DEFINE_int(debugger_port, 5858, "Port to use for remote debugging")
-DEFINE_string(map_counters, false, "Map counters to a file")
+DEFINE_string(map_counters, NULL, "Map counters to a file")
DEFINE_args(js_arguments, JSArguments(),
"Pass all remaining arguments to the script. Alias for \"--\".")