Add tests for function statements in strict mode.

src/preparser.h

 // Copyright 2011 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 222 matching lines @@
 
     int code_;
   };
 
   class Statement {
    public:
     static Statement Default() {
       return Statement(kUnknownStatement);
     }
 
+    static Statement FunctionDeclaration() {
+      return Statement(kFunctionDeclaration);
+    }
+
     // Creates expression statement from expression.
     // Preserves being an unparenthesized string literal, possibly
     // "use strict".
     static Statement ExpressionStatement(Expression expression) {
       if (!expression.IsParenthesized()) {
         if (expression.IsUseStrictLiteral()) {
           return Statement(kUseStrictExpressionStatement);
         }
         if (expression.IsStringLiteral()) {
           return Statement(kStringLiteralExpressionStatement);
         }
       }
       return Default();
     }
 
     bool IsStringLiteral() {
       return code_ != kUnknownStatement;
     }
 
     bool IsUseStrictLiteral() {
       return code_ == kUseStrictExpressionStatement;
     }
 
+    bool IsFunctionDeclaration() {
+      return code_ == kFunctionDeclaration;
+    }
+
    private:
     enum Type {
       kUnknownStatement,
       kStringLiteralExpressionStatement,
-      kUseStrictExpressionStatement
+      kUseStrictExpressionStatement,
+      kFunctionDeclaration
     };
 
     explicit Statement(Type code) : code_(code) {}
     Type code_;
   };
 
   enum SourceElements {
     kUnknownSourceElements
   };
 
@@ skipping 194 matching lines @@
   uintptr_t stack_limit_;
   i::Scanner::Location strict_mode_violation_location_;
   const char* strict_mode_violation_type_;
   bool stack_overflow_;
   bool allow_lazy_;
   bool parenthesized_function_;
 };
 } }  // v8::preparser
 
 #endif  // V8_PREPARSER_H