Move ParseUnaryExpression into ParserBase and add tests.

src/preparser.cc

Index: src/preparser.cc
diff --git a/src/preparser.cc b/src/preparser.cc
index 8a621b4ff2455b1888e7bbd06ac2bc15258a9063..398f32744cb61ff6c5e5af317d22b8d117f37b9f 100644
--- a/src/preparser.cc
+++ b/src/preparser.cc
@@ -146,8 +146,8 @@ PreParserExpression PreParserTraits::ParseFunctionLiteral(
 }
 
 
-PreParserExpression PreParserTraits::ParseUnaryExpression(bool* ok) {
-  return pre_parser_->ParseUnaryExpression(ok);
+PreParserExpression PreParserTraits::ParsePostfixExpression(bool* ok) {
+  return pre_parser_->ParsePostfixExpression(ok);
 }
 
 
@@ -842,37 +842,6 @@ PreParser::Statement PreParser::ParseDebuggerStatement(bool* ok) {
 #undef DUMMY
 
 
-PreParser::Expression PreParser::ParseUnaryExpression(bool* ok) {
-  // UnaryExpression ::
-  //   PostfixExpression
-  //   'delete' UnaryExpression
-  //   'void' UnaryExpression
-  //   'typeof' UnaryExpression
-  //   '++' UnaryExpression
-  //   '--' UnaryExpression
-  //   '+' UnaryExpression
-  //   '-' UnaryExpression
-  //   '~' UnaryExpression
-  //   '!' UnaryExpression
-
-  Token::Value op = peek();
-  if (Token::IsUnaryOp(op)) {
-    op = Next();
-    ParseUnaryExpression(ok);
-    return Expression::Default();
-  } else if (Token::IsCountOp(op)) {
-    op = Next();
-    Expression expression = ParseUnaryExpression(CHECK_OK);
-    if (strict_mode() == STRICT) {
-      CheckStrictModeLValue(expression, CHECK_OK);
-    }
-    return Expression::Default();
-  } else {
-    return ParsePostfixExpression(ok);
-  }
-}
-
-
 PreParser::Expression PreParser::ParsePostfixExpression(bool* ok) {
   // PostfixExpression ::
   //   LeftHandSideExpression ('++' | '--')?