Adds WTF::debug::ScopedCrashKey as an alias of base::debug::ScopedCrashKey.

third_party/WebKit/Source/wtf/debug/CrashLogging.h

+// Copyright 2016 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 WTF_CrashLogging_h
+#define WTF_CrashLogging_h
+
+#include "base/debug/crash_logging.h"
+#include "wtf/WTFExport.h"
+
+namespace WTF {
+namespace debug {
+
+using ScopedCrashKey = base::debug::ScopedCrashKey;
+
+} // namespace debug
+} // namespace WTF
+
+#endif // WTF_CrashLogging_h