Refactor string internalization.

src/heap.h

 // Copyright 2012 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 1125 matching lines @@
 
   // Copy the code and scope info part of the code object, but insert
   // the provided data as the relocation information.
   MUST_USE_RESULT MaybeObject* CopyCode(Code* code, Vector<byte> reloc_info);
 
   // Finds the internalized copy for string in the string table.
   // If not found, a new string 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 MaybeObject* InternalizeUtf8String(Vector<const char> str);
   MUST_USE_RESULT MaybeObject* InternalizeUtf8String(const char* str) {
     return InternalizeUtf8String(CStrVector(str));
   }
-  MUST_USE_RESULT MaybeObject* InternalizeOneByteString(
-      Vector<const uint8_t> str);
-  MUST_USE_RESULT MaybeObject* InternalizeTwoByteString(Vector<const uc16> str);
+  MUST_USE_RESULT MaybeObject* InternalizeUtf8String(Vector<const char> str);
+
   MUST_USE_RESULT MaybeObject* InternalizeString(String* str);
-  MUST_USE_RESULT MaybeObject* InternalizeOneByteString(
-      Handle<SeqOneByteString> string, int from, int length);
+  MUST_USE_RESULT MaybeObject* InternalizeStringWithKey(HashTableKey* key);
 
   bool InternalizeStringIfExists(String* str, String** result);
   bool InternalizeTwoCharsStringIfExists(String* str, String** result);
 
   // Compute the matching internalized string map for a string if possible.
   // NULL is returned if string is in new space or not flattened.
   Map* InternalizedStringMapForString(String* str);
 
   // Tries to flatten a string before compare operation.
   //
@@ skipping 1877 matching lines @@
   DisallowHeapAllocation no_allocation;  // i.e. no gc allowed.
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(PathTracer);
 };
 #endif  // DEBUG
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_H_