[Isolates] Convert more static data either to read-only or to per-isolate.

src/unicode.cc

 // Copyright 2007-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1552 matching lines @@
                                            kCanonicalizationRangeMultiStrings7,
                                            c,
                                            n,
                                            result,
                                            allow_caching_ptr);
     default: return 0;
   }
 }
 
 
-uchar UnicodeData::kMaxCodePoint = 65533;
+const uchar UnicodeData::kMaxCodePoint = 65533;
 
 int UnicodeData::GetByteCount() {
   return kUppercaseTable0Size * sizeof(int32_t)  // NOLINT
       + kUppercaseTable1Size * sizeof(int32_t)  // NOLINT
       + kUppercaseTable7Size * sizeof(int32_t)  // NOLINT
       + kLowercaseTable0Size * sizeof(int32_t)  // NOLINT
       + kLowercaseTable1Size * sizeof(int32_t)  // NOLINT
       + kLowercaseTable7Size * sizeof(int32_t)  // NOLINT
       + kLetterTable0Size * sizeof(int32_t)  // NOLINT
       + kLetterTable1Size * sizeof(int32_t)  // NOLINT
@@ skipping 29 matching lines @@
       + kEcma262CanonicalizeMultiStrings7Size * sizeof(MultiCharacterSpecialCase<1>)  // NOLINT
       + kEcma262UnCanonicalizeMultiStrings0Size * sizeof(MultiCharacterSpecialCase<4>)  // NOLINT
       + kEcma262UnCanonicalizeMultiStrings1Size * sizeof(MultiCharacterSpecialCase<2>)  // NOLINT
       + kEcma262UnCanonicalizeMultiStrings7Size * sizeof(MultiCharacterSpecialCase<2>)  // NOLINT
       + kCanonicalizationRangeMultiStrings0Size * sizeof(MultiCharacterSpecialCase<1>)  // NOLINT
       + kCanonicalizationRangeMultiStrings1Size * sizeof(MultiCharacterSpecialCase<1>)  // NOLINT
       + kCanonicalizationRangeMultiStrings7Size * sizeof(MultiCharacterSpecialCase<1>); // NOLINT
 }
 
 }  // namespace unicode