restore LOG_FATAL crash key on windows

components/crash/core/common/crash_keys.cc

 // Copyright 2015 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 "components/crash/core/common/crash_keys.h"
 
 #include "base/command_line.h"
 #include "base/debug/crash_logging.h"
 #include "base/format_macros.h"
 #include "base/logging.h"
@@ skipping 19 matching lines @@
 const char kClientId[] = "guid";
 #else
 const char kClientId[] = "guid";
 #endif
 
 const char kChannel[] = "channel";
 
 const char kNumVariations[] = "num-experiments";
 const char kVariations[] = "variations";
 
+const char kLogFatal[] = "LOG_FATAL";
+
 const char kSwitchFormat[] = "switch-%" PRIuS;
 const char kNumSwitches[] = "num-switches";
 
 const char kBug464926CrashKey[] = "bug-464926-info";
 
 #if defined(OS_MACOSX)
 namespace mac {
 
 const char kZombie[] = "zombie";
 const char kZombieTrace[] = "zombie_dealloc_bt";
@@ skipping 111 matching lines @@
     std::string key = base::StringPrintf(kSwitchFormat, key_i++);
     base::debug::SetCrashKeyValue(key, switch_str);
   }
 
   // Clear any remaining switches.
   for (; key_i <= kSwitchesMaxCount; ++key_i)
     base::debug::ClearCrashKey(base::StringPrintf(kSwitchFormat, key_i));
 }
 
 }  // namespace crash_keys