Allow lazy compilation (and thus optimisation) of functions inside eval.

src/preparser.h

 // Copyright 2012 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 132 matching lines @@
                                         uintptr_t stack_limit) {
     bool allow_lazy = (flags & i::kAllowLazy) != 0;
     bool allow_natives_syntax = (flags & i::kAllowNativesSyntax) != 0;
     bool allow_modules = (flags & i::kAllowModules) != 0;
     return PreParser(scanner, log, stack_limit, allow_lazy,
                      allow_natives_syntax, allow_modules).PreParse();
   }
 
   // Parses a single function literal, from the opening parentheses before
   // parameters to the closing brace after the body.
-  // Returns a FunctionEntry describing the body of the funciton in enough
+  // Returns a FunctionEntry describing the body of the function in enough
   // detail that it can be lazily compiled.
   // The scanner is expected to have matched the "function" keyword and
   // parameters, and have consumed the initial '{'.
-  // At return, unless an error occured, the scanner is positioned before the
+  // At return, unless an error occurred, the scanner is positioned before the
   // the final '}'.
   PreParseResult PreParseLazyFunction(i::LanguageMode mode,
                                       i::ParserRecorder* log);
 
  private:
   // Used to detect duplicates in object literals. Each of the values
   // kGetterProperty, kSetterProperty and kValueProperty represents
   // a type of object literal property. When parsing a property, its
   // type value is stored in the DuplicateFinder for the property name.
   // Values are chosen so that having intersection bits means the there is
@@ skipping 495 matching lines @@
   bool stack_overflow_;
   bool allow_lazy_;
   bool allow_modules_;
   bool allow_natives_syntax_;
   bool parenthesized_function_;
   bool harmony_scoping_;
 };
 } }  // v8::preparser
 
 #endif  // V8_PREPARSER_H