Get logging to chrome_debug.log working again on Windows Vista+.

base/logging.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_H_
 #define BASE_LOGGING_H_
 
 #include <cassert>
 #include <string>
 #include <cstring>
@@ skipping 874 matching lines @@
 
 #define RAW_LOG(level, message) logging::RawLog(logging::LOG_ ## level, message)
 
 #define RAW_CHECK(condition)                                                   \
   do {                                                                         \
     if (!(condition))                                                          \
       logging::RawLog(logging::LOG_FATAL, "Check failed: " #condition "\n");   \
   } while (0)
 
 #if defined(OS_WIN)
+// Returns true if logging to file is enabled.
+BASE_EXPORT bool IsLoggingToFileEnabled();
+
 // Returns the default log file path.
 BASE_EXPORT std::wstring GetLogFileFullPath();
 #endif
 
 }  // namespace logging
 
 // Note that "The behavior of a C++ program is undefined if it adds declarations
 // or definitions to namespace std or to a namespace within namespace std unless
 // otherwise specified." --C++11[namespace.std]
 //
@@ skipping 56 matching lines @@
 #elif NOTIMPLEMENTED_POLICY == 5
 #define NOTIMPLEMENTED() do {\
   static bool logged_once = false;\
   LOG_IF(ERROR, !logged_once) << NOTIMPLEMENTED_MSG;\
   logged_once = true;\
 } while(0);\
 EAT_STREAM_PARAMETERS
 #endif
 
 #endif  // BASE_LOGGING_H_