Chrome OS: Reduce NOTREACHED() overhead for release builds.

base/logging.cc

Index: base/logging.cc
diff --git a/base/logging.cc b/base/logging.cc
index c7a8881456d13559484dca912b5addfe219c342c..32d787cc1265a7d0da0a2b7f96dc8201a9200aac 100644
--- a/base/logging.cc
+++ b/base/logging.cc
@@ -803,6 +803,11 @@ std::wstring GetLogFileFullPath() {
 }
 #endif
 
+void LogErrorNotReached(const char* file, int line, const char* function_name) {
+  LogMessage(file, line, LOG_ERROR).stream()
+      << "NOTREACHED() hit in " << function_name << ".";
+}
+
 }  // namespace logging
 
 std::ostream& std::operator<<(std::ostream& out, const wchar_t* wstr) {