Update V8 to r3121 as required for WebKit update.

Change-Id: Ic53e0aef9a9eb9b71ee7d25a8aef61520bba899c
diff --git a/src/parser.h b/src/parser.h
index 86e1f74..7328e81 100644
--- a/src/parser.h
+++ b/src/parser.h
@@ -70,16 +70,9 @@
   int property_count() { return backing_[kPropertyCountOffset]; }
   void set_property_count(int value) { backing_[kPropertyCountOffset] = value; }
 
-  bool contains_array_literal() {
-    return backing_[kContainsArrayLiteralOffset] != 0;
-  }
-  void set_contains_array_literal(bool value) {
-    backing_[kContainsArrayLiteralOffset] = value ? 1 : 0;
-  }
-
   bool is_valid() { return backing_.length() > 0; }
 
-  static const int kSize = 5;
+  static const int kSize = 4;
 
  private:
   Vector<unsigned> backing_;
@@ -87,7 +80,6 @@
   static const int kEndPosOffset = 1;
   static const int kLiteralCountOffset = 2;
   static const int kPropertyCountOffset = 3;
-  static const int kContainsArrayLiteralOffset = 4;
 };