Move ParseBinaryExpression to ParserBase.

src/preparser.cc

Index: src/preparser.cc
diff --git a/src/preparser.cc b/src/preparser.cc
index 8b5e20d9e8cb5190c759fe66f655b90a8858e8f0..7360c56425c27598fd1848c9a552ef48a730e4c5 100644
--- a/src/preparser.cc
+++ b/src/preparser.cc
@@ -142,10 +142,8 @@ PreParserExpression PreParserTraits::ParseFunctionLiteral(
 }
 
 
-PreParserExpression PreParserTraits::ParseBinaryExpression(int prec,
-                                                           bool accept_IN,
-                                                           bool* ok) {
-  return pre_parser_->ParseBinaryExpression(prec, accept_IN, ok);
+PreParserExpression PreParserTraits::ParseUnaryExpression(bool* ok) {
+  return pre_parser_->ParseUnaryExpression(ok);
 }
 
 
@@ -840,23 +838,6 @@ PreParser::Statement PreParser::ParseDebuggerStatement(bool* ok) {
 #undef DUMMY
 
 
-// Precedence >= 4
-PreParser::Expression PreParser::ParseBinaryExpression(int prec,
-                                                       bool accept_IN,
-                                                       bool* ok) {
-  Expression result = ParseUnaryExpression(CHECK_OK);
-  for (int prec1 = Precedence(peek(), accept_IN); prec1 >= prec; prec1--) {
-    // prec1 >= 4
-    while (Precedence(peek(), accept_IN) == prec1) {
-      Next();
-      ParseBinaryExpression(prec1 + 1, accept_IN, CHECK_OK);
-      result = Expression::Default();
-    }
-  }
-  return result;
-}
-
-
 PreParser::Expression PreParser::ParseUnaryExpression(bool* ok) {
   // UnaryExpression ::
   //   PostfixExpression