Further reduce use of Element in codegen.

pkg/compiler/lib/src/ssa/builder.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 'dart:collection';
 
 import 'package:js_runtime/shared/embedded_names.dart';
 
 import '../closure.dart';
 import '../common.dart';
@@ skipping 332 matching lines @@
    * defines the defaults) is not known.
    *
    * However, inlining can only be performed when the target function can be
    * resolved statically. The defaults can therefore be included at this point.
    *
    * The [providedArguments] list contains first all positional arguments, then
    * the provided named arguments (the named arguments that are defined in the
    * [selector]) in a specific order (see [addDynamicSendArgumentsToList]).
    */
   List<HInstruction> completeDynamicSendArgumentsList(Selector selector,
-      FunctionElement function, List<HInstruction> providedArguments) {
+      MethodElement function, List<HInstruction> providedArguments) {
     assert(selector.applies(function));
     FunctionSignature signature = function.functionSignature;
     List<HInstruction> compiledArguments = new List<HInstruction>(
         signature.parameterCount + 1); // Plus one for receiver.
 
     compiledArguments[0] = providedArguments[0]; // Receiver.
     int index = 1;
     for (; index <= signature.requiredParameterCount; index++) {
       compiledArguments[index] = providedArguments[index];
     }
@@ skipping 52 matching lines @@
     if (backend.isJsInterop(element) && !element.isFactoryConstructor) {
       // We only inline factory JavaScript interop constructors.
       return false;
     }
 
     // Ensure that [element] is an implementation element.
     element = element.implementation;
 
     if (compiler.elementHasCompileTimeError(element)) return false;
 
-    FunctionElement function = element;
+    MethodElement function = element;
     ResolvedAst functionResolvedAst = function.resolvedAst;
     bool insideLoop = loopDepth > 0 || graph.calledInLoop;
 
     // Bail out early if the inlining decision is in the cache and we can't
     // inline (no need to check the hard constraints).
     bool cachedCanBeInlined =
         backend.inlineCache.canInline(function, insideLoop: insideLoop);
     if (cachedCanBeInlined == false) return false;
 
     bool meetsHardConstraints() {
@@ skipping 6317 matching lines @@
       this.oldReturnLocal,
       this.oldReturnType,
       this.oldResolvedAst,
       this.oldStack,
       this.oldLocalsHandler,
       this.inTryStatement,
       this.allFunctionsCalledOnce,
       this.oldElementInferenceResults)
       : super(function);
 }