Revert "Ensure we're looking at the correct resolved AST when initializing fields in constructors."

pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart

Index: pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart
diff --git a/pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart b/pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart
index 326359df4e7dfb05f8d745e84ebc2ebd6b5055c4..e108ad5a69729c0818a3827d0707bbdbad6f8a56 100644
--- a/pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart
+++ b/pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart
@@ -5,8 +5,6 @@
 import 'package:js_runtime/shared/embedded_names.dart';
 import 'package:kernel/ast.dart' as ir;
 
-import 'dart:collection' show Queue;
-
 import '../common.dart';
 import '../common/names.dart';
 import '../compiler.dart';
@@ -38,6 +36,7 @@ import 'types.dart';
 class KernelAstAdapter {
   final Kernel kernel;
   final JavaScriptBackend _backend;
+  final ResolvedAst _resolvedAst;
   final Map<ir.Node, ast.Node> _nodeToAst;
   final Map<ir.Node, Element> _nodeToElement;
   final Map<ir.VariableDeclaration, SyntheticLocal> _syntheticLocals =
@@ -45,12 +44,6 @@ class KernelAstAdapter {
   final Map<ir.LabeledStatement, KernelJumpTarget> _jumpTargets =
       <ir.LabeledStatement, KernelJumpTarget>{};
   DartTypeConverter _typeConverter;
-  ResolvedAst _resolvedAst;
-
-  /// Sometimes for resolution the resolved AST element needs to change (for
-  /// example, if we're inlining, or if we're in a constructor, but then also
-  /// constructing the field values). We keep track of this with a stack.
-  Queue<ResolvedAst> _resolvedAstStack;
 
   KernelAstAdapter(this.kernel, this._backend, this._resolvedAst,
       this._nodeToAst, this._nodeToElement) {
@@ -74,20 +67,6 @@ class KernelAstAdapter {
       _nodeToElement[kernel.typeParameters[typeVariable]] = typeVariable;
     }
     _typeConverter = new DartTypeConverter(this);
-    _resolvedAstStack = new Queue<ResolvedAst>();
-  }
-
-  /// Push the existing resolved AST on the stack and shift the current resolved
-  /// AST to the AST that this kernel node points to.
-  void pushResolvedAst(ir.Node node) {
-    _resolvedAstStack.addLast(_resolvedAst);
-    _resolvedAst = getElement(node).resolvedAst;
-  }
-
-  /// Pop the resolved AST stack to reset it to the previous resolved AST node.
-  void popResolvedAstStack() {
-    assert(_resolvedAstStack.isNotEmpty);
-    _resolvedAst = _resolvedAstStack.removeLast();
   }
 
   Compiler get _compiler => _backend.compiler;