Separate UnicodeCache out into an own file.

src/unicode-cache.h

+// Copyright 2015 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_UNICODE_CACHE_H_
+#define V8_UNICODE_CACHE_H_
+
+#include "src/base/macros.h"
+#include "src/char-predicates.h"
+#include "src/unicode.h"
+#include "src/unicode-decoder.h"
+
+namespace v8 {
+namespace internal {
+
+// Caching predicates used by scanners.
+class UnicodeCache {
+ public:
+  UnicodeCache() {}
+  typedef unibrow::Utf8Decoder<512> Utf8Decoder;
+
+  StaticResource<Utf8Decoder>* utf8_decoder() { return &utf8_decoder_; }
+
+  inline bool IsIdentifierStart(unibrow::uchar c);
+  inline bool IsIdentifierPart(unibrow::uchar c);
+  inline bool IsLineTerminator(unibrow::uchar c);
+  inline bool IsLineTerminatorSequence(unibrow::uchar c, unibrow::uchar next);
+
+  inline bool IsWhiteSpace(unibrow::uchar c);
+  inline bool IsWhiteSpaceOrLineTerminator(unibrow::uchar c);
+
+ private:
+  unibrow::Predicate<IdentifierStart, 128> kIsIdentifierStart;
+  unibrow::Predicate<IdentifierPart, 128> kIsIdentifierPart;
+  unibrow::Predicate<unibrow::LineTerminator, 128> kIsLineTerminator;
+  unibrow::Predicate<WhiteSpace, 128> kIsWhiteSpace;
+  unibrow::Predicate<WhiteSpaceOrLineTerminator, 128>
+      kIsWhiteSpaceOrLineTerminator;
+  StaticResource<Utf8Decoder> utf8_decoder_;
+
+  DISALLOW_COPY_AND_ASSIGN(UnicodeCache);
+};
+
+}  // namespace internal
+}  // namespace v8
+
+#endif  // V8_UNICODE_CACHE_H_