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

src/mips/assembler-mips.cc

Index: src/mips/assembler-mips.cc
diff --git a/src/mips/assembler-mips.cc b/src/mips/assembler-mips.cc
index 402dfc8e13e19c3fedb646df53f012685a8bd052..381de5d0e84e0e0586408446ad07a9ff41d02fb7 100644
--- a/src/mips/assembler-mips.cc
+++ b/src/mips/assembler-mips.cc
@@ -225,6 +225,7 @@
   // Verify all Objects referred by code are NOT in new space.
   Object* obj = *handle;
   if (obj->IsHeapObject()) {
+    DCHECK(!HeapObject::cast(obj)->GetHeap()->InNewSpace(obj));
     imm32_ = reinterpret_cast<intptr_t>(handle.location());
     rmode_ = RelocInfo::EMBEDDED_OBJECT;
   } else {