Avoid bool to Oddball conversions by being lazy.

src/parser.cc

Index: src/parser.cc
diff --git a/src/parser.cc b/src/parser.cc
index 62b633ea2807f4edbfed4d6147196058f3745ec9..632215aaa11582238d0b3e1d339ceb84bcab915a 100644
--- a/src/parser.cc
+++ b/src/parser.cc
@@ -3212,7 +3212,7 @@ Expression* Parser::ParseUnaryExpression(bool* ok) {
       Handle<Object> literal = expression->AsLiteral()->handle();
       if (op == Token::NOT) {
         // Convert the literal to a boolean condition and negate it.
-        bool condition = literal->ToBoolean()->IsTrue();
+        bool condition = literal->BooleanValue();
         Handle<Object> result(isolate()->heap()->ToBoolean(!condition),
                               isolate());
         return factory()->NewLiteral(result);