Change scanner buffers to not use utf-8.

src/heap.h

 // Copyright 2010 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 413 matching lines @@
 
   // Allocates a symbol in old space based on the character stream.
   // Returns Failure::RetryAfterGC(requested_bytes, space) if the allocation
   // failed.
   // Please note this function does not perform a garbage collection.
   MUST_USE_RESULT static inline MaybeObject* AllocateSymbol(
       Vector<const char> str,
       int chars,
       uint32_t hash_field);
 
+  MUST_USE_RESULT static inline MaybeObject* AllocateAsciiSymbol(
+        Vector<const char> str,
+        uint32_t hash_field);
+
+  MUST_USE_RESULT static inline MaybeObject* AllocateTwoByteSymbol(
+        Vector<const uc16> str,
+        uint32_t hash_field);
+
   MUST_USE_RESULT static MaybeObject* AllocateInternalSymbol(
       unibrow::CharacterStream* buffer, int chars, uint32_t hash_field);
 
   MUST_USE_RESULT static MaybeObject* AllocateExternalSymbol(
       Vector<const char> str,
       int chars);
 
 
   // Allocates and partially initializes a String.  There are two String
   // encodings: ASCII and two byte.  These functions allocate a string of the
@@ skipping 235 matching lines @@
   // the provided data as the relocation information.
   MUST_USE_RESULT static MaybeObject* CopyCode(Code* code,
                                                Vector<byte> reloc_info);
 
   // Finds the symbol for string in the symbol table.
   // If not found, a new symbol is added to the table and returned.
   // Returns Failure::RetryAfterGC(requested_bytes, space) if allocation
   // failed.
   // Please note this function does not perform a garbage collection.
   MUST_USE_RESULT static MaybeObject* LookupSymbol(Vector<const char> str);
+  MUST_USE_RESULT static MaybeObject* LookupAsciiSymbol(Vector<const char> str);
+  MUST_USE_RESULT static MaybeObject* LookupTwoByteSymbol(
+      Vector<const uc16> str);
   MUST_USE_RESULT static MaybeObject* LookupAsciiSymbol(const char* str) {
     return LookupSymbol(CStrVector(str));
   }
   MUST_USE_RESULT static MaybeObject* LookupSymbol(String* str);
   static bool LookupSymbolIfExists(String* str, String** symbol);
   static bool LookupTwoCharsSymbolIfExists(String* str, String** symbol);
 
   // Compute the matching symbol map for a string if possible.
   // NULL is returned if string is in new space or not flattened.
   static Map* SymbolMapForString(String* str);
@@ skipping 1412 matching lines @@
   // Return whether this object should be retained. If NULL is returned the
   // object has no references. Otherwise the address of the retained object
   // should be returned as in some GC situations the object has been moved.
   virtual Object* RetainAs(Object* object) = 0;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_H_