Implement handlified String::Equals and Name::Equals.

src/heap-inl.h

Index: src/heap-inl.h
diff --git a/src/heap-inl.h b/src/heap-inl.h
index ea7dcda3b0acd8aee62f2507a5ab5852bd7196d1..f3ac56a8d48a0e73d61ad0614a10fa4702f8bac7 100644
--- a/src/heap-inl.h
+++ b/src/heap-inl.h
@@ -560,25 +560,6 @@ bool Heap::CollectGarbage(AllocationSpace space,
 }
 
 
-MaybeObject* Heap::PrepareForCompare(String* str) {
-  // Always flatten small strings and force flattening of long strings
-  // after we have accumulated a certain amount we failed to flatten.
-  static const int kMaxAlwaysFlattenLength = 32;
-  static const int kFlattenLongThreshold = 16*KB;
-
-  const int length = str->length();
-  MaybeObject* obj = str->TryFlatten();
-  if (length <= kMaxAlwaysFlattenLength ||
-      unflattened_strings_length_ >= kFlattenLongThreshold) {
-    return obj;
-  }
-  if (obj->IsFailure()) {
-    unflattened_strings_length_ += length;
-  }
-  return str;
-}
-
-
 int64_t Heap::AdjustAmountOfExternalAllocatedMemory(
     int64_t change_in_bytes) {
   ASSERT(HasBeenSetUp());