No longer store the compilation-context in WorkItem.

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

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import 'package:kernel/ast.dart' as ir;
 
 import '../common/codegen.dart' show CodegenRegistry, CodegenWorkItem;
 import '../common/tasks.dart' show CompilerTask;
 import '../compiler.dart';
 import '../diagnostics/spannable.dart';
 import '../elements/elements.dart';
 import '../io/source_information.dart';
 import '../js_backend/backend.dart' show JavaScriptBackend;
 import '../kernel/kernel.dart';
 import '../kernel/kernel_visitor.dart';
 import '../resolution/tree_elements.dart';
 import '../tree/dartstring.dart';
 import '../types/masks.dart';
 
+import 'context.dart';
 import 'graph_builder.dart';
 import 'kernel_ast_adapter.dart';
 import 'locals_handler.dart';
 import 'nodes.dart';
 import 'ssa_branch_builder.dart';
 
 class SsaKernelBuilderTask extends CompilerTask {
   final JavaScriptBackend backend;
   final SourceInformationStrategy sourceInformationFactory;
 
   String get name => 'SSA kernel builder';
 
   SsaKernelBuilderTask(JavaScriptBackend backend, this.sourceInformationFactory)
       : backend = backend,
         super(backend.compiler.measurer);
 
-  HGraph build(CodegenWorkItem work) {
+  HGraph build(CodegenWorkItem work, SsaCompilationContext context) {

[Siggi Cherem (dart-lang), 2016/09/02 22:26:38]

not in use yet, but it will be :)

     return measure(() {
       AstElement element = work.element.implementation;
       TreeElements treeElements = work.resolvedAst.elements;
       Kernel kernel = new Kernel(backend.compiler);
       KernelVisitor visitor = new KernelVisitor(element, treeElements, kernel);
       IrFunction function;
       try {
         function = visitor.buildFunction();
       } catch (e) {
         throw "Failed to convert to Kernel IR: $e";
@@ skipping 258 matching lines @@
   visitThisExpression(ir.ThisExpression thisExpression) {
     stack.add(localsHandler.readThis());
   }
 
   @override
   visitNot(ir.Not not) {
     not.operand.accept(this);
     push(new HNot(popBoolified(), backend.boolType));
   }
 }