Revert "Eliminate all code related to the AutomaticProfileResetter."

chrome/browser/profile_resetter/jtl_interpreter.h

+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_PROFILE_RESETTER_JTL_INTERPRETER_H_
+#define CHROME_BROWSER_PROFILE_RESETTER_JTL_INTERPRETER_H_
+
+#include <string>
+
+#include "base/basictypes.h"
+#include "base/values.h"
+
+// Executes a JTL program on a given dictionary.
+//
+// JTL (Json Traversal Language) programs are defined in jtl_foundation.h
+class JtlInterpreter {
+ public:
+  enum Result {
+    OK,
+    PARSE_ERROR,
+    RUNTIME_ERROR,
+    RESULT_MAX,
+  };
+
+  // |hasher_seed| is a value used in jtl_foundation::Hasher. All node names,
+  // strings, integers and doubles are hashed before being compared to hash
+  // values listed in |program|.
+  // |program| is a byte array containing a JTL program.
+  // |input| is a dictionary on which the program is evaluated.
+  JtlInterpreter(const std::string& hasher_seed,
+                 const std::string& program,
+                 const base::DictionaryValue* input);
+  ~JtlInterpreter();
+
+  void Execute();
+
+  Result result() const { return result_; }
+  const base::DictionaryValue* working_memory() const {
+    return working_memory_.get();
+  }
+  bool GetOutputBoolean(const std::string& unhashed_key, bool* output) const;
+  bool GetOutputString(const std::string& unhashed_key,
+                       std::string* output) const;
+
+  // Generates a checksum of the loaded program, defined as the first 3 bytes of
+  // the program's SHA-256 hash interpreted as a big-endian integer.
+  int CalculateProgramChecksum() const;
+
+ private:
+  // Input.
+  std::string hasher_seed_;
+  std::string program_;
+  const base::DictionaryValue* input_;
+  // Output.
+  scoped_ptr<base::DictionaryValue> working_memory_;
+  Result result_;
+
+  DISALLOW_COPY_AND_ASSIGN(JtlInterpreter);
+};
+
+#endif  // CHROME_BROWSER_PROFILE_RESETTER_JTL_INTERPRETER_H_