Revert of [heap] Avoid the use of cells to point from code to new-space objects.

src/mips64/assembler-mips64.cc

Index: src/mips64/assembler-mips64.cc
diff --git a/src/mips64/assembler-mips64.cc b/src/mips64/assembler-mips64.cc
index 1eb312f8ca8ad2bdb07806a014239dd74fe18216..bd4e3e225fbee830479f418fe50b641d9c1b9e6e 100644
--- a/src/mips64/assembler-mips64.cc
+++ b/src/mips64/assembler-mips64.cc
@@ -204,6 +204,7 @@
   // Verify all Objects referred by code are NOT in new space.
   Object* obj = *handle;
   if (obj->IsHeapObject()) {
+    DCHECK(!HeapObject::cast(obj)->GetHeap()->InNewSpace(obj));
     imm64_ = reinterpret_cast<intptr_t>(handle.location());
     rmode_ = RelocInfo::EMBEDDED_OBJECT;
   } else {