Parser / PreParser: remove dead code.

Eval calls are tracked by ParserBase::CheckPossibleEvalCall which
doesn't use (Pre)?Parser::IsDirectEvalCall.

Also we no longer seem to care about IsBinaryOperation (Parser didn't
have it either).

BUG=

Review-Url: https://codereview.chromium.org/2528603003
Cr-Commit-Position: refs/heads/master@{#41216}

src/parsing/parser.h

@@ -720,12 +720,6 @@ class V8_EXPORT_PRIVATE Parser : public NON_EXPORTED_BASE(ParserBase<Parser>) {
     return identifier == ast_value_factory()->constructor_string();
   }
 
-  V8_INLINE bool IsDirectEvalCall(Expression* expression) const {
-    if (!expression->IsCall()) return false;
-    expression = expression->AsCall()->expression();
-    return IsIdentifier(expression) && IsEval(AsIdentifier(expression));
-  }
-
   V8_INLINE static bool IsBoilerplateProperty(
       ObjectLiteral::Property* property) {
     return ObjectLiteral::IsBoilerplateProperty(property);

src/parsing/preparser.h

@@ -150,7 +150,7 @@ class PreParserExpression {
   static PreParserExpression BinaryOperation(PreParserExpression left,
                                              Token::Value op,
                                              PreParserExpression right) {
-    return PreParserExpression(TypeField::encode(kBinaryOperationExpression));
+    return PreParserExpression(TypeField::encode(kExpression));
   }
 
   static PreParserExpression Assignment() {
@@ -284,11 +284,6 @@ class PreParserExpression {
             ExpressionTypeField::decode(code_) == kCallEvalExpression);
   }
 
-  bool IsDirectEvalCall() const {
-    return TypeField::decode(code_) == kExpression &&
-           ExpressionTypeField::decode(code_) == kCallEvalExpression;
-  }
-
   bool IsSuperCallReference() const {
     return TypeField::decode(code_) == kExpression &&
            ExpressionTypeField::decode(code_) == kSuperCallReference;
@@ -313,10 +308,6 @@ class PreParserExpression {
 
   PreParserExpression AsFunctionLiteral() { return *this; }
 
-  bool IsBinaryOperation() const {
-    return TypeField::decode(code_) == kBinaryOperationExpression;
-  }
-
   // Dummy implementation for making expression->somefunc() work in both Parser
   // and PreParser.
   PreParserExpression* operator->() { return this; }
@@ -337,7 +328,6 @@ class PreParserExpression {
     kExpression,
     kIdentifierExpression,
     kStringLiteralExpression,
-    kBinaryOperationExpression,
     kSpreadExpression,
     kObjectLiteralExpression,
     kArrayLiteralExpression
@@ -1149,10 +1139,6 @@ class PreParser : public ParserBase<PreParser> {
     return identifier.IsConstructor();
   }
 
-  V8_INLINE bool IsDirectEvalCall(PreParserExpression expression) const {
-    return expression.IsDirectEvalCall();
-  }
-
   V8_INLINE static bool IsBoilerplateProperty(PreParserExpression property) {
     // PreParser doesn't count boilerplate properties.
     return false;