Add stub versions of KernelInferrerEngine and friends

pkg/compiler/lib/src/inferrer/type_graph_inferrer.dart

Index: pkg/compiler/lib/src/inferrer/type_graph_inferrer.dart
diff --git a/pkg/compiler/lib/src/inferrer/type_graph_inferrer.dart b/pkg/compiler/lib/src/inferrer/type_graph_inferrer.dart
index cb0c6182cf1da65a81595901a158a98d1aa40259..153b70323f51d958cb5b4b0cd0f3caa7afa9bb53 100644
--- a/pkg/compiler/lib/src/inferrer/type_graph_inferrer.dart
+++ b/pkg/compiler/lib/src/inferrer/type_graph_inferrer.dart
@@ -50,13 +50,15 @@ class WorkQueue {
   int get length => queue.length;
 }
 
-class TypeGraphInferrer implements TypesInferrer {
-  InferrerEngine inferrer;
-  final Compiler compiler;
+abstract class TypeGraphInferrer<T> implements TypesInferrer<T> {
+  InferrerEngine<T> inferrer;
+  final bool _disableTypeInference;
   final ClosedWorld closedWorld;
   final ClosedWorldRefiner closedWorldRefiner;
 
-  TypeGraphInferrer(this.compiler, this.closedWorld, this.closedWorldRefiner);
+  TypeGraphInferrer(this.closedWorld, this.closedWorldRefiner,
+      {bool disableTypeInference: false})
+      : this._disableTypeInference = disableTypeInference;
 
   String get name => 'Graph inferrer';
 
@@ -65,51 +67,52 @@ class TypeGraphInferrer implements TypesInferrer {
   TypeMask get _dynamicType => commonMasks.dynamicType;
 
   void analyzeMain(FunctionEntity main) {
-    inferrer =
-        new AstInferrerEngine(compiler, closedWorld, closedWorldRefiner, main);
+    inferrer = createInferrerEngineFor(main);
     inferrer.runOverAllElements();
   }
 
-  TypeMask getReturnTypeOfMember(MemberElement element) {
-    if (compiler.disableTypeInference) return _dynamicType;
+  InferrerEngine<T> createInferrerEngineFor(FunctionEntity main);
+
+  TypeMask getReturnTypeOfMember(MemberEntity element) {
+    if (_disableTypeInference) return _dynamicType;
     // Currently, closure calls return dynamic.
-    if (element is! MethodElement) return _dynamicType;
+    if (element is! FunctionElement) return _dynamicType;
     return inferrer.types.getInferredTypeOfMember(element).type;
   }
 
-  TypeMask getReturnTypeOfParameter(ParameterElement element) {
-    if (compiler.disableTypeInference) return _dynamicType;
+  TypeMask getReturnTypeOfParameter(Local element) {
+    if (_disableTypeInference) return _dynamicType;
     return _dynamicType;
   }
 
-  TypeMask getTypeOfMember(MemberElement element) {
-    if (compiler.disableTypeInference) return _dynamicType;
+  TypeMask getTypeOfMember(MemberEntity element) {
+    if (_disableTypeInference) return _dynamicType;
     // The inferrer stores the return type for a function, so we have to
     // be careful to not return it here.
-    if (element is MethodElement) return commonMasks.functionType;
+    if (element is FunctionEntity) return commonMasks.functionType;
     return inferrer.types.getInferredTypeOfMember(element).type;
   }
 
-  TypeMask getTypeOfParameter(ParameterElement element) {
-    if (compiler.disableTypeInference) return _dynamicType;
+  TypeMask getTypeOfParameter(Local element) {
+    if (_disableTypeInference) return _dynamicType;
     // The inferrer stores the return type for a function, so we have to
     // be careful to not return it here.
     return inferrer.types.getInferredTypeOfParameter(element).type;
   }
 
-  TypeMask getTypeForNewList(ast.Node node) {
-    if (compiler.disableTypeInference) return _dynamicType;
+  TypeMask getTypeForNewList(T node) {
+    if (_disableTypeInference) return _dynamicType;
     return inferrer.types.allocatedLists[node].type;
   }
 
-  bool isFixedArrayCheckedForGrowable(ast.Node node) {
-    if (compiler.disableTypeInference) return true;
+  bool isFixedArrayCheckedForGrowable(T node) {
+    if (_disableTypeInference) return true;
     ListTypeInformation info = inferrer.types.allocatedLists[node];
     return info.checksGrowable;
   }
 
   TypeMask getTypeOfSelector(Selector selector, TypeMask mask) {
-    if (compiler.disableTypeInference) return _dynamicType;
+    if (_disableTypeInference) return _dynamicType;
     // Bailout for closure calls. We're not tracking types of
     // closures.
     if (selector.isClosureCall) return _dynamicType;
@@ -137,16 +140,16 @@ class TypeGraphInferrer implements TypesInferrer {
     return result;
   }
 
-  Iterable<MemberEntity> getCallersOf(MemberElement element) {
-    if (compiler.disableTypeInference) {
+  Iterable<MemberEntity> getCallersOf(MemberEntity element) {
+    if (_disableTypeInference) {
       throw new UnsupportedError(
           "Cannot query the type inferrer when type inference is disabled.");
     }
     return inferrer.getCallersOf(element);
   }
 
-  bool isMemberCalledOnce(MemberElement element) {
-    if (compiler.disableTypeInference) return false;
+  bool isMemberCalledOnce(MemberEntity element) {
+    if (_disableTypeInference) return false;
     MemberTypeInformation info =
         inferrer.types.getInferredTypeOfMember(element);
     return info.isCalledOnce();
@@ -156,3 +159,18 @@ class TypeGraphInferrer implements TypesInferrer {
     inferrer.clear();
   }
 }
+
+class AstTypeGraphInferrer extends TypeGraphInferrer<ast.Node> {
+  final Compiler _compiler;
+
+  AstTypeGraphInferrer(
+      this._compiler, ClosedWorld closedWorld, closedWorldRefiner,
+      {bool disableTypeInference: false})
+      : super(closedWorld, closedWorldRefiner,
+            disableTypeInference: disableTypeInference);
+
+  InferrerEngine<ast.Node> createInferrerEngineFor(FunctionEntity main) {
+    return new AstInferrerEngine(
+        _compiler, closedWorld, closedWorldRefiner, main);
+  }
+}