Add assertion to UniqueValueId constructor.

src/hydrogen-instructions.h

Index: src/hydrogen-instructions.h
diff --git a/src/hydrogen-instructions.h b/src/hydrogen-instructions.h
index aa2cdae0a83190b00c7dbdd132f9066e518f49ae..a6e5a23e062fc4062b65fdd7052dd58f1e90282a 100644
--- a/src/hydrogen-instructions.h
+++ b/src/hydrogen-instructions.h
@@ -309,12 +309,11 @@ class UniqueValueId V8_FINAL {
  public:
   UniqueValueId() : raw_address_(NULL) { }
 
-  explicit UniqueValueId(Object* object) {
-    raw_address_ = reinterpret_cast<Address>(object);
-    ASSERT(IsInitialized());
-  }
-
   explicit UniqueValueId(Handle<Object> handle) {
+    ASSERT(!AllowHeapAllocation::IsAllowed() ||
+           handle->IsSmi() ||
+           HeapObject::cast(*handle)->GetHeap()->IsInRootsArray(
+               handle.location()));
     static const Address kEmptyHandleSentinel = reinterpret_cast<Address>(1);
     if (handle.is_null()) {
       raw_address_ = kEmptyHandleSentinel;
@@ -3326,15 +3325,15 @@ class HConstant V8_FINAL : public HTemplateInstruction<0> {
     }
 
     ASSERT(!handle_.is_null());
-    Heap* heap = isolate()->heap();
-    ASSERT(unique_id_ != UniqueValueId(heap->minus_zero_value()));
-    ASSERT(unique_id_ != UniqueValueId(heap->nan_value()));
-    return unique_id_ == UniqueValueId(heap->undefined_value()) ||
-           unique_id_ == UniqueValueId(heap->null_value()) ||
-           unique_id_ == UniqueValueId(heap->true_value()) ||
-           unique_id_ == UniqueValueId(heap->false_value()) ||
-           unique_id_ == UniqueValueId(heap->the_hole_value()) ||
-           unique_id_ == UniqueValueId(heap->empty_string());
+    Factory* factory = isolate()->factory();
+    ASSERT(unique_id_ != UniqueValueId(factory->minus_zero_value()));
+    ASSERT(unique_id_ != UniqueValueId(factory->nan_value()));
+    return unique_id_ == UniqueValueId(factory->undefined_value()) ||
+           unique_id_ == UniqueValueId(factory->null_value()) ||
+           unique_id_ == UniqueValueId(factory->true_value()) ||
+           unique_id_ == UniqueValueId(factory->false_value()) ||
+           unique_id_ == UniqueValueId(factory->the_hole_value()) ||
+           unique_id_ == UniqueValueId(factory->empty_string());
   }
 
   bool IsCell() const {