Update harmony ObjectProtoToString() to 2/2/2015 spec

test/cctest/cctest.h

 // Copyright 2008 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 329 matching lines @@
 static inline v8::Local<v8::Value> v8_num(double x) {
   return v8::Number::New(v8::Isolate::GetCurrent(), x);
 }
 
 
 static inline v8::Local<v8::String> v8_str(const char* x) {
   return v8::String::NewFromUtf8(v8::Isolate::GetCurrent(), x);
 }
 
 
+static inline v8::Local<v8::Symbol> v8_symbol(const char* name) {
+  return v8::Symbol::New(v8::Isolate::GetCurrent(), v8_str(name));
+}
+
+
 static inline v8::Local<v8::Script> v8_compile(const char* x) {
   return v8::Script::Compile(v8_str(x));
 }
 
 
 static inline v8::Local<v8::Script> v8_compile(v8::Local<v8::String> x) {
   return v8::Script::Compile(x);
 }
 
 
@@ skipping 232 matching lines @@
   HandleAndZoneScope() {}
 
   // Prefixing the below with main_ reduces a lot of naming clashes.
   i::Zone* main_zone() { return &main_zone_; }
 
  private:
   i::Zone main_zone_;
 };
 
 #endif  // ifndef CCTEST_H_