Provide baseline for new GC infrastructure.

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index 591012805b0c8c44d3009c2deb5ed80ceeae81cb..81d6cafe765afc694d9bf0c6eaef59bc6607126a 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -798,14 +798,16 @@ MaybeObject* Object::GetProperty(String* key, PropertyAttributes* attributes) {
 // CONDITIONAL_WRITE_BARRIER must be issued after the actual
 // write due to the assert validating the written value.
 #define CONDITIONAL_WRITE_BARRIER(object, offset, mode) \
-  if (mode == UPDATE_WRITE_BARRIER) { \
-    Heap::RecordWrite(object->address(), offset); \
-  } else { \
-    ASSERT(mode == SKIP_WRITE_BARRIER); \
-    ASSERT(Heap::InNewSpace(object) || \
-           !Heap::InNewSpace(READ_FIELD(object, offset)) || \
-           Page::FromAddress(object->address())->           \
-               IsRegionDirty(object->address() + offset));  \
+  if (!FLAG_new_gc) { \
+    if (mode == UPDATE_WRITE_BARRIER) { \
+      Heap::RecordWrite(object->address(), offset); \
+    } else { \
+      ASSERT(mode == SKIP_WRITE_BARRIER); \
+      ASSERT(Heap::InNewSpace(object) || \
+             !Heap::InNewSpace(READ_FIELD(object, offset)) || \
+             Page::FromAddress(object->address())->           \
+                 IsRegionDirty(object->address() + offset));  \
+    } \
   }
 
 #define READ_DOUBLE_FIELD(p, offset) \
@@ -1018,6 +1020,7 @@ void MapWord::ClearOverflow() {
 
 
 MapWord MapWord::EncodeAddress(Address map_address, int offset) {
+  ASSERT(!FLAG_new_gc);
   // Offset is the distance in live bytes from the first live object in the
   // same page. The offset between two objects in the same page should not
   // exceed the object area size of a page.