Revert r4715.

test/cctest/test-spaces.cc

Index: test/cctest/test-spaces.cc
===================================================================
--- test/cctest/test-spaces.cc	(revision 4722)
+++ test/cctest/test-spaces.cc	(working copy)
@@ -32,32 +32,40 @@
 
 using namespace v8::internal;
 
-static void VerifyRegionMarking(Address page_start) {
+static void VerifyRSet(Address page_start) {
+#ifdef DEBUG
+  Page::set_rset_state(Page::IN_USE);
+#endif
+
   Page* p = Page::FromAddress(page_start);
 
-  p->SetRegionMarks(Page::kAllRegionsCleanMarks);
+  p->ClearRSet();
 
   for (Address addr = p->ObjectAreaStart();
        addr < p->ObjectAreaEnd();
        addr += kPointerSize) {
-    CHECK(!Page::FromAddress(addr)->IsRegionDirty(addr));
+    CHECK(!Page::IsRSetSet(addr, 0));
   }
 
   for (Address addr = p->ObjectAreaStart();
        addr < p->ObjectAreaEnd();
        addr += kPointerSize) {
-    Page::FromAddress(addr)->MarkRegionDirty(addr);
+    Page::SetRSet(addr, 0);
   }
 
   for (Address addr = p->ObjectAreaStart();
        addr < p->ObjectAreaEnd();
        addr += kPointerSize) {
-    CHECK(Page::FromAddress(addr)->IsRegionDirty(addr));
+    CHECK(Page::IsRSetSet(addr, 0));
   }
 }
 
 
 TEST(Page) {
+#ifdef DEBUG
+  Page::set_rset_state(Page::NOT_IN_USE);
+#endif
+
   byte* mem = NewArray<byte>(2*Page::kPageSize);
   CHECK(mem != NULL);
 
@@ -82,8 +90,8 @@
   CHECK(p->OffsetToAddress(Page::kObjectStartOffset) == p->ObjectAreaStart());
   CHECK(p->OffsetToAddress(Page::kPageSize) == p->ObjectAreaEnd());
 
-  // test region marking
-  VerifyRegionMarking(page_start);
+  // test remember set
+  VerifyRSet(page_start);
 
   DeleteArray(mem);
 }