Deleted OS_WIN and all Windows specific files from base.

base/logging_win.h

-// Copyright (c) 2012 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 BASE_LOGGING_WIN_H_
-#define BASE_LOGGING_WIN_H_
-
-#include <string>
-
-#include "base/base_export.h"
-#include "base/basictypes.h"
-#include "base/win/event_trace_provider.h"
-#include "base/logging.h"
-
-template <typename Type>
-struct StaticMemorySingletonTraits;
-
-namespace logging {
-
-// Event ID for the log messages we generate.
-EXTERN_C BASE_EXPORT const GUID kLogEventId;
-
-// Feature enable mask for LogEventProvider.
-enum LogEnableMask {
-  // If this bit is set in our provider enable mask, we will include
-  // a stack trace with every log message.
-  ENABLE_STACK_TRACE_CAPTURE = 0x0001,
-  // If this bit is set in our provider enable mask, the provider will log
-  // a LOG message with only the textual content of the message, and no
-  // stack trace.
-  ENABLE_LOG_MESSAGE_ONLY = 0x0002,
-};
-
-// The message types our log event provider generates.
-// ETW likes user message types to start at 10.
-enum LogMessageTypes {
-  // A textual only log message, contains a zero-terminated string.
-  LOG_MESSAGE = 10,
-  // A message with a stack trace, followed by the zero-terminated
-  // message text.
-  LOG_MESSAGE_WITH_STACKTRACE = 11,
-  // A message with:
-  //  a stack trace,
-  //  the line number as a four byte integer,
-  //  the file as a zero terminated UTF8 string,
-  //  the zero-terminated UTF8 message text.
-  LOG_MESSAGE_FULL = 12,
-};
-
-// Trace provider class to drive log control and transport
-// with Event Tracing for Windows.
-class BASE_EXPORT LogEventProvider : public base::win::EtwTraceProvider {
- public:
-  static LogEventProvider* GetInstance();
-
-  static bool LogMessage(logging::LogSeverity severity, const char* file,
-      int line, size_t message_start, const std::string& str);
-
-  static void Initialize(const GUID& provider_name);
-  static void Uninitialize();
-
- protected:
-  // Overridden to manipulate the log level on ETW control callbacks.
-  void OnEventsEnabled() override;
-  void OnEventsDisabled() override;
-
- private:
-  LogEventProvider();
-
-  // The log severity prior to OnEventsEnabled,
-  // restored in OnEventsDisabled.
-  logging::LogSeverity old_log_level_;
-
-  friend struct StaticMemorySingletonTraits<LogEventProvider>;
-  DISALLOW_COPY_AND_ASSIGN(LogEventProvider);
-};
-
-}  // namespace logging
-
-#endif  // BASE_LOGGING_WIN_H_