Force eager compilation of parenthesized functions.

src/parser.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 518 matching lines @@
     bool only_simple_this_property_assignments_;
     Handle<FixedArray> this_property_assignments_;
 
     Parser* parser_;
     FunctionState* outer_function_state_;
     Scope* outer_scope_;
     int saved_ast_node_id_;
     AstNodeFactory<AstConstructionVisitor> factory_;
   };
 
+  class ParsingModeScope BASE_EMBEDDED {
+   public:
+    ParsingModeScope(Parser* parser, Mode mode)
+        : parser_(parser),
+          old_mode_(parser->mode()) {
+      parser_->mode_ = mode;
+    }
+    ~ParsingModeScope() {
+      parser_->mode_ = old_mode_;
+    }
 
-
+   private:
+    Parser* parser_;
+    Mode old_mode_;
+  };
 
   FunctionLiteral* ParseLazy(Utf16CharacterStream* source,
                              ZoneScope* zone_scope);
 
   Isolate* isolate() { return isolate_; }
   Zone* zone() const { return zone_; }
   CompilationInfo* info() const { return info_; }
 
   // Called by ParseProgram after setting up the scanner.
   FunctionLiteral* DoParseProgram(CompilationInfo* info,
@@ skipping 314 matching lines @@
  private:
   static const int kTypeSlot = 0;
   static const int kElementsSlot = 1;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(CompileTimeValue);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_PARSER_H_