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diff --git a/deps/v8/src/strings/char-predicates.h b/deps/v8/src/strings/char-predicates.h
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index 0000000000..43b4d091d1
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+++ b/deps/v8/src/strings/char-predicates.h
@@ -0,0 +1,85 @@
+// Copyright 2011 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_STRINGS_CHAR_PREDICATES_H_
+#define V8_STRINGS_CHAR_PREDICATES_H_
+
+#include "src/common/globals.h"
+#include "src/strings/unicode.h"
+
+namespace v8 {
+namespace internal {
+
+// Unicode character predicates as defined by ECMA-262, 3rd,
+// used for lexical analysis.
+
+inline constexpr int AsciiAlphaToLower(uc32 c);
+inline constexpr bool IsCarriageReturn(uc32 c);
+inline constexpr bool IsLineFeed(uc32 c);
+inline constexpr bool IsAsciiIdentifier(uc32 c);
+inline constexpr bool IsAlphaNumeric(uc32 c);
+inline constexpr bool IsDecimalDigit(uc32 c);
+inline constexpr bool IsHexDigit(uc32 c);
+inline constexpr bool IsOctalDigit(uc32 c);
+inline constexpr bool IsBinaryDigit(uc32 c);
+inline constexpr bool IsRegExpWord(uc32 c);
+inline constexpr bool IsRegExpNewline(uc32 c);
+
+// ES#sec-names-and-keywords
+// This includes '_', '$' and '\', and ID_Start according to
+// http://www.unicode.org/reports/tr31/, which consists of categories
+// 'Lu', 'Ll', 'Lt', 'Lm', 'Lo', 'Nl', but excluding properties
+// 'Pattern_Syntax' or 'Pattern_White_Space'.
+inline bool IsIdentifierStart(uc32 c);
+#ifdef V8_INTL_SUPPORT
+V8_EXPORT_PRIVATE bool IsIdentifierStartSlow(uc32 c);
+#else
+inline bool IsIdentifierStartSlow(uc32 c) {
+  // Non-BMP characters are not supported without I18N.
+  return (c <= 0xFFFF) ? unibrow::ID_Start::Is(c) : false;
+}
+#endif
+
+// ES#sec-names-and-keywords
+// This includes \u200c and \u200d, and ID_Continue according to
+// http://www.unicode.org/reports/tr31/, which consists of ID_Start,
+// the categories 'Mn', 'Mc', 'Nd', 'Pc', but excluding properties
+// 'Pattern_Syntax' or 'Pattern_White_Space'.
+inline bool IsIdentifierPart(uc32 c);
+#ifdef V8_INTL_SUPPORT
+V8_EXPORT_PRIVATE bool IsIdentifierPartSlow(uc32 c);
+#else
+inline bool IsIdentifierPartSlow(uc32 c) {
+  // Non-BMP charaacters are not supported without I18N.
+  if (c <= 0xFFFF) {
+    return unibrow::ID_Start::Is(c) || unibrow::ID_Continue::Is(c);
+  }
+  return false;
+}
+#endif
+
+// ES6 draft section 11.2
+// This includes all code points of Unicode category 'Zs'.
+// Further included are \u0009, \u000b, \u000c, and \ufeff.
+inline bool IsWhiteSpace(uc32 c);
+#ifdef V8_INTL_SUPPORT
+V8_EXPORT_PRIVATE bool IsWhiteSpaceSlow(uc32 c);
+#else
+inline bool IsWhiteSpaceSlow(uc32 c) { return unibrow::WhiteSpace::Is(c); }
+#endif
+
+// WhiteSpace and LineTerminator according to ES6 draft section 11.2 and 11.3
+// This includes all the characters with Unicode category 'Z' (= Zs+Zl+Zp)
+// as well as \u0009 - \u000d and \ufeff.
+inline bool IsWhiteSpaceOrLineTerminator(uc32 c);
+inline bool IsWhiteSpaceOrLineTerminatorSlow(uc32 c) {
+  return IsWhiteSpaceSlow(c) || unibrow::IsLineTerminator(c);
+}
+
+inline bool IsLineTerminatorSequence(uc32 c, uc32 next);
+
+}  // namespace internal
+}  // namespace v8
+
+#endif  // V8_STRINGS_CHAR_PREDICATES_H_