Fix errors

Author: CyrusNajmabadi

src/EditorFeatures/VisualBasicTest/AutomaticCompletion/AutomaticLineEnderTests.vb

@@ -2,6 +2,7 @@
 ' The .NET Foundation licenses this file to you under the MIT license.
 ' See the LICENSE file in the project root for more information.
 
+Imports Microsoft.CodeAnalysis.Editor.[Shared].Utilities
 Imports Microsoft.CodeAnalysis.Editor.UnitTests.AutomaticCompletion
 Imports Microsoft.CodeAnalysis.Editor.UnitTests.Extensions
 Imports Microsoft.CodeAnalysis.Editor.UnitTests.Utilities
@@ -271,6 +272,7 @@ End Module
 
         Protected Overrides Function CreateNextHandler(workspace As EditorTestWorkspace) As Action
             Dim endConstructor = New EndConstructCommandHandler(
+                workspace.GetService(Of IThreadingContext),
                 workspace.GetService(Of IEditorOperationsFactoryService),
                 workspace.GetService(Of ITextUndoHistoryRegistry),
                 workspace.GetService(Of EditorOptionsService))

src/EditorFeatures/VisualBasicTest/EndConstructGeneration/EndConstructTestingHelpers.vb

@@ -4,6 +4,7 @@
 
 Imports System.Threading
 Imports Microsoft.CodeAnalysis
+Imports Microsoft.CodeAnalysis.Editor.[Shared].Utilities
 Imports Microsoft.CodeAnalysis.Editor.UnitTests
 Imports Microsoft.CodeAnalysis.Editor.UnitTests.Utilities
 Imports Microsoft.CodeAnalysis.Editor.UnitTests.Workspaces
@@ -223,6 +224,7 @@ Namespace Microsoft.CodeAnalysis.Editor.VisualBasic.UnitTests.EndConstructGenera
 
                 Dim factory = workspace.GetService(Of IEditorOperationsFactoryService)()
                 Dim endConstructor = New EndConstructCommandHandler(
+                    workspace.GetService(Of IThreadingContext),
                     factory,
                     workspace.GetService(Of ITextUndoHistoryRegistry),
                     workspace.GetService(Of EditorOptionsService))