Move Hydrogen and Lithium to src/crankshaft/

src/crankshaft/unique.h

Index: src/crankshaft/unique.h
diff --git a/src/unique.h b/src/crankshaft/unique.h
similarity index 98%
rename from src/unique.h
rename to src/crankshaft/unique.h
index 3497735496586f5cec435a775f04dc45fd1c7a4c..54abfa77106fa1dbd575b14d42b0d945afad2f46 100644
--- a/src/unique.h
+++ b/src/crankshaft/unique.h
@@ -2,11 +2,12 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef V8_UNIQUE_H_
-#define V8_UNIQUE_H_
+#ifndef V8_CRANKSHAFT_UNIQUE_H_
+#define V8_CRANKSHAFT_UNIQUE_H_
 
 #include <ostream>  // NOLINT(readability/streams)
 
+#include "src/assert-scope.h"
 #include "src/base/functional.h"
 #include "src/handles.h"
 #include "src/utils.h"
@@ -358,4 +359,4 @@ class UniqueSet final : public ZoneObject {
 }  // namespace internal
 }  // namespace v8
 
-#endif  // V8_UNIQUE_H_
+#endif  // V8_CRANKSHAFT_UNIQUE_H_