Fix numerous bugs introduced by reducing Page::kMaxHeapObjectSize.

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 d20ea2cc97d44c15b5735352ce0fdaba7472cbc4..debc3db071d6759dfccff4655ffe382de49d0e20 100644
--- a/test/cctest/test-spaces.cc
+++ b/test/cctest/test-spaces.cc
@@ -168,8 +168,8 @@ TEST(OldSpace) {
 
   CHECK(s->Setup());
 
-  while (s->Available() > 0) {
-    s->AllocateRaw(Page::kMaxHeapObjectSize)->ToObjectUnchecked();
+  while (s->Available() > Page::kMaxHeapObjectSize) {
+    s->AllocateRaw(Page::kMaxHeapObjectSize)->ToObjectChecked();
   }
 
   s->TearDown();