Provide baseline GC version.

test/cctest/test-spaces.cc

Index: test/cctest/test-spaces.cc
diff --git a/test/cctest/test-spaces.cc b/test/cctest/test-spaces.cc
index 706c6bf9a4f368360001c47b56db4ac632b53549..994901f9230b4358ccb221d50a7282ec9a7159c9 100644
--- a/test/cctest/test-spaces.cc
+++ b/test/cctest/test-spaces.cc
@@ -33,6 +33,7 @@
 using namespace v8::internal;
 
 static void VerifyRegionMarking(Address page_start) {
+#ifndef BASELINE_GC
   Page* p = Page::FromAddress(page_start);
 
   p->SetRegionMarks(Page::kAllRegionsCleanMarks);
@@ -54,6 +55,7 @@ static void VerifyRegionMarking(Address page_start) {
        addr += kPointerSize) {
     CHECK(Page::FromAddress(addr)->IsRegionDirty(addr));
   }
+#endif
 }