Get rid of obsolete unchecked accessors.

src/heap.cc

Index: src/heap.cc
diff --git a/src/heap.cc b/src/heap.cc
index 0d2cc42402f4b3457b1d28340984069d452dbd7d..909e7605b0f3094bec5a69472e8a38ed7eed4f5b 100644
--- a/src/heap.cc
+++ b/src/heap.cc
@@ -7206,7 +7206,7 @@ void TranscendentalCache::Clear() {
 void ExternalStringTable::CleanUp() {
   int last = 0;
   for (int i = 0; i < new_space_strings_.length(); ++i) {
-    if (new_space_strings_[i] == heap_->raw_unchecked_the_hole_value()) {
+    if (new_space_strings_[i] == heap_->the_hole_value()) {
       continue;
     }
     if (heap_->InNewSpace(new_space_strings_[i])) {
@@ -7218,7 +7218,7 @@ void ExternalStringTable::CleanUp() {
   new_space_strings_.Rewind(last);
   last = 0;
   for (int i = 0; i < old_space_strings_.length(); ++i) {
-    if (old_space_strings_[i] == heap_->raw_unchecked_the_hole_value()) {
+    if (old_space_strings_[i] == heap_->the_hole_value()) {
       continue;
     }
     ASSERT(!heap_->InNewSpace(old_space_strings_[i]));