[regexp] Properly flatten string during initialization

src/runtime/runtime.h

 // Copyright 2012 the V8 project 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 V8_RUNTIME_RUNTIME_H_
 #define V8_RUNTIME_RUNTIME_H_
 
 #include <memory>
 
 #include "src/allocation.h"
@@ skipping 531 matching lines @@
 
 #define FOR_EACH_INTRINSIC_SYMBOL(F) \
   F(CreateSymbol, 1, 1)              \
   F(CreatePrivateSymbol, 1, 1)       \
   F(SymbolDescription, 1, 1)         \
   F(SymbolDescriptiveString, 1, 1)   \
   F(SymbolIsPrivate, 1, 1)
 
 #define FOR_EACH_INTRINSIC_TEST(F)            \
   F(ConstructDouble, 2, 1)                    \
+  F(ConstructConsString, 2, 1)                \
   F(DeoptimizeFunction, 1, 1)                 \
   F(DeoptimizeNow, 0, 1)                      \
   F(RunningInSimulator, 0, 1)                 \
   F(IsConcurrentRecompilationSupported, 0, 1) \
   F(OptimizeFunctionOnNextCall, -1, 1)        \
   F(InterpretFunctionOnNextCall, 1, 1)        \
   F(BaselineFunctionOnNextCall, 1, 1)         \
   F(OptimizeOsr, -1, 1)                       \
   F(NeverOptimizeFunction, 1, 1)              \
   F(GetOptimizationStatus, -1, 1)             \
@@ skipping 292 matching lines @@
   kMaybeDeopted = 1 << 3,
   kOptimized = 1 << 4,
   kTurboFanned = 1 << 5,
   kInterpreted = 1 << 6,
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_RUNTIME_RUNTIME_H_