Remove support for Object.observe

test/cctest/test-field-type-tracking.cc

 // Copyright 2015 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.
 
 #include <stdlib.h>
 #include <utility>
 
 #include "test/cctest/test-api.h"
 
 #include "src/v8.h"
@@ skipping 1756 matching lines @@
     bool generalizes_representations() const { return false; }
     bool is_non_equevalent_transition() const { return false; }
   };
   TestConfig config;
   TestGeneralizeRepresentationWithSpecialTransition(
       config, Representation::Smi(), any_type, Representation::HeapObject(),
       value_type, Representation::Tagged(), any_type);
 }
 
 
-TEST(ForObservedTransitionFromMapOwningDescriptor) {
-  CcTest::InitializeVM();
-  v8::HandleScope scope(CcTest::isolate());
-  Isolate* isolate = CcTest::i_isolate();
-  Handle<FieldType> any_type = FieldType::Any(isolate);
-  Handle<FieldType> value_type =
-      FieldType::Class(Map::Create(isolate, 0), isolate);
-
-  struct TestConfig {
-    Handle<Map> Transition(Handle<Map> map) {
-      return Map::CopyForObserved(map);
-    }
-    // TODO(ishell): remove once IS_PROTO_TRANS_ISSUE_FIXED is removed.
-    bool generalizes_representations() const { return false; }
-    bool is_non_equevalent_transition() const { return true; }
-  };
-  TestConfig config;
-  TestGeneralizeRepresentationWithSpecialTransition(
-      config, Representation::Smi(), any_type, Representation::HeapObject(),
-      value_type, Representation::Tagged(), any_type);
-}
-
-
-TEST(ForObservedTransitionFromMapNotOwningDescriptor) {
-  CcTest::InitializeVM();
-  v8::HandleScope scope(CcTest::isolate());
-  Isolate* isolate = CcTest::i_isolate();
-  Handle<FieldType> any_type = FieldType::Any(isolate);
-  Handle<FieldType> value_type =
-      FieldType::Class(Map::Create(isolate, 0), isolate);
-
-  struct TestConfig {
-    Handle<Map> Transition(Handle<Map> map) {
-      Isolate* isolate = CcTest::i_isolate();
-      Handle<FieldType> any_type = FieldType::Any(isolate);
-
-      // Add one more transition to |map| in order to prevent descriptors
-      // ownership.
-      CHECK(map->owns_descriptors());
-      Map::CopyWithField(map, MakeString("foo"), any_type, NONE,
-                         Representation::Smi(), INSERT_TRANSITION)
-          .ToHandleChecked();
-      CHECK(!map->owns_descriptors());
-
-      return Map::CopyForObserved(map);
-    }
-    // TODO(ishell): remove once IS_PROTO_TRANS_ISSUE_FIXED is removed.
-    bool generalizes_representations() const { return false; }
-    bool is_non_equevalent_transition() const { return true; }
-  };
-  TestConfig config;
-  TestGeneralizeRepresentationWithSpecialTransition(
-      config, Representation::Smi(), any_type, Representation::HeapObject(),
-      value_type, Representation::Tagged(), any_type);
-}
-
-
 TEST(PrototypeTransitionFromMapOwningDescriptor) {
   CcTest::InitializeVM();
   v8::HandleScope scope(CcTest::isolate());
   Isolate* isolate = CcTest::i_isolate();
 
   Handle<FieldType> any_type = FieldType::Any(isolate);
   Handle<FieldType> value_type =
       FieldType::Class(Map::Create(isolate, 0), isolate);
 
   struct TestConfig {
@@ skipping 335 matching lines @@
   Handle<AccessorPair> pair = CreateAccessorPair(true, true);
   TransitionToAccessorConstantOperator transition_op(pair);
 
   SameMapChecker checker;
   TestTransitionTo(transition_op, transition_op, checker);
 }
 
 
 // TODO(ishell): add this test once IS_ACCESSOR_FIELD_SUPPORTED is supported.
 // TEST(TransitionAccessorConstantToAnotherAccessorConstant)