[test] Test expectations in cctest should use CHECK and not DCHECK.

test/cctest/test-unboxed-doubles.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // TODO(mythria): Remove this define after this flag is turned on globally
 #define V8_IMMINENT_DEPRECATION_WARNINGS
 
 #include <stdlib.h>
 #include <utility>
 
@@ skipping 50 matching lines @@
                     v8_str(name))
               .ToLocalChecked())));
 }
 
 
 static double GetDoubleFieldValue(JSObject* obj, FieldIndex field_index) {
   if (obj->IsUnboxedDoubleField(field_index)) {
     return obj->RawFastDoublePropertyAt(field_index);
   } else {
     Object* value = obj->RawFastPropertyAt(field_index);
-    DCHECK(value->IsMutableHeapNumber());
+    CHECK(value->IsMutableHeapNumber());
     return HeapNumber::cast(value)->value();
   }
 }
 
 const int kNumberOfBits = 32;
 
 
 enum TestPropertyKind {
   PROP_CONSTANT,
   PROP_SMI,
@@ skipping 1524 matching lines @@
 
 // TODO(ishell): add respective tests for property kind reconfiguring from
 // accessor field to double, once accessor fields are supported by
 // Map::ReconfigureProperty().
 
 
 // TODO(ishell): add respective tests for fast property removal case once
 // Map::ReconfigureProperty() supports that.
 
 #endif