Support completion items with no Glyphs (for JavaScript).

src/EditorFeatures/Core/Implementation/InlineRename/AbstractEditorInlineRenameService.FailureInlineRenameInfo.cs

@@ -31,7 +31,7 @@ public FailureInlineRenameInfo(string localizedErrorMessage)
 
             public string FullDisplayName { get { return null; } }
 
-            public Glyph Glyph { get { return default(Glyph); } }
+            public Glyph Glyph => Glyph.None;
 
             public string GetFinalSymbolName(string replacementText) { return null; }
 

src/EditorFeatures/Core/Implementation/IntelliSense/Completion/Presentation/CustomCommitCompletion.cs

@@ -87,13 +87,7 @@ public string GetDescription_TestingOnly()
             return GetDescriptionAsync(CancellationToken.None).WaitAndGetResult(CancellationToken.None).Text;
         }
 
-        public override ImageMoniker IconMoniker
-        {
-            get
-            {
-                return _imageMoniker;
-            }
-        }
+        public override ImageMoniker IconMoniker => _imageMoniker;
 
         public override string IconAutomationText
         {

src/EditorFeatures/Core/Shared/Extensions/GlyphExtensions.cs

@@ -220,6 +220,9 @@ public static ImageMoniker GetImageMoniker(this Glyph glyph)
         {
             switch (glyph)
             {
+                case Glyph.None:
+                    return default(ImageMoniker);
+
                 case Glyph.Assembly:
                     return KnownMonikers.Assembly;
 
@@ -638,7 +641,7 @@ public static Glyph GetGlyph(this ImmutableArray<string> tags)
                 }
             }
 
-            return default(Glyph);
+            return Glyph.None;
         }
 
         private static Accessibility GetAccessibility(ImmutableArray<string> tags)

src/Features/Core/Portable/Common/Glyph.cs

@@ -4,6 +4,8 @@ namespace Microsoft.CodeAnalysis
 {
     internal enum Glyph
     {
+        None,
+
         Assembly,
 
         BasicFile,