Make CompilerTask independent of compiler.

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

 // Copyright (c) 2012, 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 '../common.dart';
 import '../common/codegen.dart' show CodegenRegistry, CodegenWorkItem;
 import '../common/tasks.dart' show CompilerTask;
 import '../compiler.dart' show Compiler;
 import '../constants/constant_system.dart';
 import '../constants/values.dart';
@@ skipping 11 matching lines @@
 import '../universe/selector.dart' show Selector;
 import '../universe/use.dart' show DynamicUse, StaticUse, TypeUse;
 import '../util/util.dart';
 import '../world.dart' show ClassWorld;
 import 'codegen_helpers.dart';
 import 'nodes.dart';
 import 'variable_allocator.dart';
 
 class SsaCodeGeneratorTask extends CompilerTask {
   final JavaScriptBackend backend;
+  final Compiler compiler;
   final SourceInformationStrategy sourceInformationFactory;
 
   SsaCodeGeneratorTask(JavaScriptBackend backend, this.sourceInformationFactory)
       : this.backend = backend,
-        super(backend.compiler);
+        this.compiler = backend.compiler,
+        super(backend.compiler.measurer);
 
   String get name => 'SSA code generator';
   NativeEmitter get nativeEmitter => backend.emitter.nativeEmitter;
 
   js.Fun buildJavaScriptFunction(
       ResolvedAst resolvedAst, List<js.Parameter> parameters, js.Block body) {
     FunctionElement element = resolvedAst.element;
     js.AsyncModifier asyncModifier = element.asyncMarker.isAsync
         ? (element.asyncMarker.isYielding
             ? const js.AsyncModifier.asyncStar()
@@ skipping 2847 matching lines @@
     registry.registerStaticUse(new StaticUse.staticInvoke(
         helper, new CallStructure.unnamed(argumentCount)));
     return backend.emitter.staticFunctionAccess(helper);
   }
 
   @override
   void visitRef(HRef node) {
     visit(node.value);
   }
 }