Clean up unused constant globals

remoting/host/server_log_entry.cc

 // 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.
 
 #include "remoting/host/server_log_entry.h"
 
 #include "base/logging.h"
 #include "base/strings/stringize_macros.h"
 #include "base/sys_info.h"
 #include "remoting/base/constants.h"
@@ skipping 26 matching lines @@
 
 const char kKeySessionState[] = "session-state";
 const char kValueSessionStateConnected[] = "connected";
 const char kValueSessionStateClosed[] = "closed";
 
 const char kStatusName[] = "status";
 const char kExitCodeName[] = "exit-code";
 
 const char kKeyOsName[] = "os-name";
 
+#if defined(OS_WIN) || defined(OS_MACOSX) || defined(OS_CHROMEOS)
 const char kKeyOsVersion[] = "os-version";
+#endif
 
 const char kKeyHostVersion[] = "host-version";
 
 const char kKeyCpu[] = "cpu";
 
 const char kKeyConnectionType[] = "connection-type";
 
 }  // namespace
 
 ServerLogEntry::ServerLogEntry() {
@@ skipping 102 matching lines @@
 // static
 const char* ServerLogEntry::GetValueSessionState(bool connected) {
   return connected ? kValueSessionStateConnected : kValueSessionStateClosed;
 }
 
 void ServerLogEntry::Set(const std::string& key, const std::string& value) {
   values_map_[key] = value;
 }
 
 }  // namespace remoting