🏄 [heap] Add page evacuation mode for new->old

src/heap/heap.cc

Index: src/heap/heap.cc
diff --git a/src/heap/heap.cc b/src/heap/heap.cc
index 187db39aaae9660330dbef3ba899114c6790f719..7bc6082b3a5651372e1a75ea189fdb8ee676cc45 100644
--- a/src/heap/heap.cc
+++ b/src/heap/heap.cc
@@ -6217,7 +6217,6 @@ void DescriptorLookupCache::Clear() {
   for (int index = 0; index < kLength; index++) keys_[index].source = NULL;
 }
 
-
 void Heap::ExternalStringTable::CleanUp() {
   int last = 0;
   for (int i = 0; i < new_space_strings_.length(); ++i) {
@@ -6252,7 +6251,6 @@ void Heap::ExternalStringTable::CleanUp() {
 #endif
 }
 
-
 void Heap::ExternalStringTable::TearDown() {
   for (int i = 0; i < new_space_strings_.length(); ++i) {
     heap_->FinalizeExternalString(ExternalString::cast(new_space_strings_[i]));