Turn CHECK()s into ASSERT()s.

src/arm64/lithium-codegen-arm64.cc

Index: src/arm64/lithium-codegen-arm64.cc
diff --git a/src/arm64/lithium-codegen-arm64.cc b/src/arm64/lithium-codegen-arm64.cc
index 85f15aef04ca125e250f94869689d69e0ea4967e..b064d3da9f12870157ecfc9f4b60e923129fcc42 100644
--- a/src/arm64/lithium-codegen-arm64.cc
+++ b/src/arm64/lithium-codegen-arm64.cc
@@ -2551,9 +2551,10 @@ void LCodeGen::DoConstantT(LConstantT* instr) {
   AllowDeferredHandleDereference smi_check;
   if (instr->hydrogen()->HasObjectMap()) {
     Handle<Map> object_map = instr->hydrogen()->ObjectMap().handle();
-    CHECK(object->IsHeapObject());
-    CHECK(!object_map->is_stable() ||
-          *object_map == Handle<HeapObject>::cast(object)->map());
+    ASSERT(object->IsHeapObject());
+    ASSERT(!object_map->is_stable() ||
+           *object_map == Handle<HeapObject>::cast(object)->map());
+    USE(object_map);
   }
   __ LoadObject(ToRegister(instr->result()), object);
 }