Elements. Deprecate PropertyInducingElement.

Change-Id: If84a698e785773aad5f00aaa2cba28296ed1b9d6
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/418912
Commit-Queue: Konstantin Shcheglov <[email protected]>
Reviewed-by: Paul Berry <[email protected]>

Author: scheglov

pkg/analyzer/api.txt

@@ -3480,7 +3480,7 @@ package:analyzer/dart/element/element.dart:
     isGetter (getter: bool)
     isSetter (getter: bool)
     variable2 (getter: PropertyInducingElement?)
-  PropertyInducingElement (class extends Object implements VariableElement):
+  PropertyInducingElement (class extends Object implements VariableElement, deprecated):
     new (constructor: PropertyInducingElement Function())
     displayName (getter: String)
     getter (getter: PropertyAccessorElement?, deprecated)

pkg/analyzer/lib/dart/element/element.dart

@@ -2101,16 +2101,15 @@ abstract class PropertyAccessorElement implements ExecutableElement {
 /// * Every explicit variable is represented by a non-synthetic
 ///   [PropertyInducingElement].
 /// * Every explicit variable induces a getter and possibly a setter, both of
-// ignore:deprecated_member_use_from_same_package
 ///   which are represented by synthetic [PropertyAccessorElement]s.
 /// * Every explicit getter or setter is represented by a non-synthetic
-// ignore:deprecated_member_use_from_same_package
 ///   [PropertyAccessorElement].
 /// * Every explicit getter or setter (or pair thereof if they have the same
 ///   name) induces a variable that is represented by a synthetic
 ///   [PropertyInducingElement].
 ///
 /// Clients may not extend, implement or mix-in this class.
+@Deprecated('Use PropertyInducingElement2 instead')
 abstract class PropertyInducingElement implements VariableElement {
   @override
   String get displayName;

pkg/analyzer/lib/src/dart/element/element.dart

@@ -10260,7 +10260,6 @@ abstract class PropertyInducingElement2OrMember
   SetterElement2OrMember? get setter2;
 }
 
-/// A concrete implementation of a [PropertyInducingElement].
 abstract class PropertyInducingElementImpl
     extends NonParameterVariableElementImpl
     with AugmentableFragment
@@ -10483,7 +10482,10 @@ abstract class PropertyInducingElementImpl2 extends VariableElementImpl2
 /// Common base class for all analyzer-internal classes that implement
 /// `PropertyInducingElement`.
 abstract class PropertyInducingElementOrMember
-    implements PropertyInducingElement, VariableElementOrMember {
+    implements
+        // ignore:deprecated_member_use_from_same_package
+        PropertyInducingElement,
+        VariableElementOrMember {
   @override
   TypeImpl get type;
 }