crash-reporter: Use standard logging and new libchromeos Process code

system_logging.h

-// Copyright (c) 2010 The Chromium OS 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 CRASH_REPORTER_SYSTEM_LOGGING_H_
-#define CRASH_REPORTER_SYSTEM_LOGGING_H_
-
-#include <stdarg.h>
-#include <string>
-
-class SystemLogging {
- public:
-  virtual void Initialize(const char *ident) = 0;
-  virtual void LogInfo(const char *format, ...) = 0;
-  virtual void LogWarning(const char *format, ...) = 0;
-  virtual void LogError(const char *format, ...) = 0;
-  virtual void set_accumulating(bool value) = 0;
-  virtual std::string get_accumulator() = 0;
-};
-
-// SystemLoggingImpl implements SystemLogging but adds the
-// capability of accumulating the log to a STL string.
-class SystemLoggingImpl : public SystemLogging {
- public:
-  SystemLoggingImpl();
-  virtual ~SystemLoggingImpl();
-  virtual void Initialize(const char *ident);
-  virtual void LogInfo(const char *format, ...);
-  virtual void LogWarning(const char *format, ...);
-  virtual void LogError(const char *format, ...);
-  virtual void set_accumulating(bool value) {
-    is_accumulating_ = value;
-  }
-  virtual std::string get_accumulator() {
-    return accumulator_;
-  }
- private:
-  static std::string identity_;
-  std::string accumulator_;
-  bool is_accumulating_;
-  void LogWithLevel(int level, const char *format,
-                    va_list arg_list);
-};
-
-#endif  // CRASH_REPORTER_SYSTEM_LOGGING_H_