Provide baseline for new GC infrastructure.

src/heap-inl.h

Index: src/heap-inl.h
diff --git a/src/heap-inl.h b/src/heap-inl.h
index 8f6fb989eb71b2d23240f78b0edf593a246c07d9..b1802b5817f5ccd40afa3e5d5979ce5982b47ae4 100644
--- a/src/heap-inl.h
+++ b/src/heap-inl.h
@@ -192,6 +192,7 @@ bool Heap::ShouldBePromoted(Address old_address, int object_size) {
 
 
 void Heap::RecordWrite(Address address, int offset) {
+  if (FLAG_new_gc) return;
   if (new_space_.Contains(address)) return;
   ASSERT(!new_space_.FromSpaceContains(address));
   SLOW_ASSERT(Contains(address + offset));
@@ -200,6 +201,7 @@ void Heap::RecordWrite(Address address, int offset) {
 
 
 void Heap::RecordWrites(Address address, int start, int len) {
+  if (FLAG_new_gc) return;
   if (new_space_.Contains(address)) return;
   ASSERT(!new_space_.FromSpaceContains(address));
   Page* page = Page::FromAddress(address);
@@ -253,6 +255,11 @@ void Heap::CopyBlock(Address dst, Address src, int byte_size) {
 void Heap::CopyBlockToOldSpaceAndUpdateRegionMarks(Address dst,
                                                    Address src,
                                                    int byte_size) {
+  if (FLAG_new_gc) {
+    CopyBlock(dst, src, byte_size);
+    return;
+  }
+
   ASSERT(IsAligned(byte_size, kPointerSize));
 
   Page* page = Page::FromAddress(dst);
@@ -305,7 +312,11 @@ void Heap::MoveBlockToOldSpaceAndUpdateRegionMarks(Address dst,
   ASSERT((dst >= (src + byte_size)) ||
          ((OffsetFrom(src) - OffsetFrom(dst)) >= kPointerSize));
 
-  CopyBlockToOldSpaceAndUpdateRegionMarks(dst, src, byte_size);
+  if (FLAG_new_gc) {
+    MoveBlock(dst, src, byte_size);
+  } else {
+    CopyBlockToOldSpaceAndUpdateRegionMarks(dst, src, byte_size);
+  }
 }