Don't lazily compile functions that are immediately receded by '('.

src/preparser.h

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 126 matching lines @@
   // Private constructor only used in PreParseProgram.
   PreParser(i::JavaScriptScanner* scanner,
             i::ParserRecorder* log,
             uintptr_t stack_limit,
             bool allow_lazy)
       : scanner_(scanner),
         log_(log),
         scope_(NULL),
         stack_limit_(stack_limit),
         stack_overflow_(false),
-        allow_lazy_(true) { }
+        allow_lazy_(true),
+        parenthesized_function_(false) { }
 
   // Preparse the program. Only called in PreParseProgram after creating
   // the instance.
   PreParseResult PreParse() {
     Scope top_scope(&scope_, kTopLevelScope);
     bool ok = true;
     ParseSourceElements(i::Token::EOS, &ok);
     if (stack_overflow_) return kPreParseStackOverflow;
     if (!ok) {
       ReportUnexpectedToken(scanner_->current_token());
@@ skipping 103 matching lines @@
   void ExpectSemicolon(bool* ok);
 
   static int Precedence(i::Token::Value tok, bool accept_IN);
 
   i::JavaScriptScanner* scanner_;
   i::ParserRecorder* log_;
   Scope* scope_;
   uintptr_t stack_limit_;
   bool stack_overflow_;
   bool allow_lazy_;
+  bool parenthesized_function_;
 };
 } }  // v8::preparser
 
 #endif  // V8_PREPARSER_H