re-land Use FunctionElementImpl for inline function type parameters

pkg/analyzer/lib/src/generated/resolver.dart

Index: pkg/analyzer/lib/src/generated/resolver.dart
diff --git a/pkg/analyzer/lib/src/generated/resolver.dart b/pkg/analyzer/lib/src/generated/resolver.dart
index b1709e6dbf387e0d865312fade23bb0393977153..ad1cd606e01da266f2beca48b84da5c9a984955c 100644
--- a/pkg/analyzer/lib/src/generated/resolver.dart
+++ b/pkg/analyzer/lib/src/generated/resolver.dart
@@ -14939,33 +14939,12 @@ class TypeResolverVisitor extends ScopedVisitor {
   void _setFunctionTypedParameterType(ParameterElementImpl element,
       TypeName returnType, FormalParameterList parameterList) {
     List<ParameterElement> parameters = _getElements(parameterList);
-    FunctionTypeAliasElementImpl aliasElement =
-        new FunctionTypeAliasElementImpl.forNode(null);
-    aliasElement.synthetic = true;
-    aliasElement.shareParameters(parameters);
-    aliasElement.returnType = _computeReturnType(returnType);
-    // FunctionTypeAliasElementImpl assumes the enclosing element is a
-    // CompilationUnitElement (because non-synthetic function types can only be
-    // declared at top level), so to avoid breaking things, go find the
-    // compilation unit element.
-    aliasElement.enclosingElement =
-        element.getAncestor((element) => element is CompilationUnitElement);
-    ClassElement definingClass =
-        element.getAncestor((element) => element is ClassElement);
-    if (definingClass != null) {
-      aliasElement.shareTypeParameters(definingClass.typeParameters);
-    } else {
-      FunctionTypeAliasElement alias =
-          element.getAncestor((element) => element is FunctionTypeAliasElement);
-      while (alias != null && alias.isSynthetic) {
-        alias =
-            alias.getAncestor((element) => element is FunctionTypeAliasElement);
-      }
-      if (alias != null) {
-        aliasElement.typeParameters = alias.typeParameters;
-      }
-    }
-    element.type = new FunctionTypeImpl.forTypedef(aliasElement);
+    FunctionElementImpl functionElement = new FunctionElementImpl.forNode(null);
+    functionElement.synthetic = true;
+    functionElement.shareParameters(parameters);
+    functionElement.returnType = _computeReturnType(returnType);
+    functionElement.enclosingElement = element;
+    element.type = new FunctionTypeImpl(functionElement);
   }
 
   /**