restore LOG_FATAL crash key on windows

components/crash/core/common/crash_keys.h

Index: components/crash/core/common/crash_keys.h
diff --git a/components/crash/core/common/crash_keys.h b/components/crash/core/common/crash_keys.h
index fdd1ee53f745296ee36d4e4004c77ac032ba32d1..93c1023c6bfd98ad339afe7b28936f641d701190 100644
--- a/components/crash/core/common/crash_keys.h
+++ b/components/crash/core/common/crash_keys.h
@@ -92,6 +92,9 @@ extern const char kNumVariations[];
 // typically set by SetExperimentList.
 extern const char kVariations[];
 
+// The last fatal log message.
+extern const char kLogFatal[];
+
 // The maximum number of command line switches to process. |kSwitchFormat|
 // should be formatted with an integer in the range [1, kSwitchesMaxCount].
 const size_t kSwitchesMaxCount = 15;