Update V8 to r3431 as required by WebKit r51976.

Change-Id: I567392c3f8c0a0d5201a4249611ac4ccf468cd5b
diff --git a/src/arguments.h b/src/arguments.h
index d2f1bfc..3fed223 100644
--- a/src/arguments.h
+++ b/src/arguments.h
@@ -77,9 +77,9 @@
 // can.
 class CustomArguments : public Relocatable {
  public:
-  inline CustomArguments(Object *data,
-                         JSObject *self,
-                         JSObject *holder) {
+  inline CustomArguments(Object* data,
+                         JSObject* self,
+                         JSObject* holder) {
     values_[3] = self;
     values_[2] = holder;
     values_[1] = Smi::FromInt(0);