Pass conditional symbols to completion engine.

Author: dgrunwald

src/AddIns/BackendBindings/CSharpBinding/Project/Src/Completion/CSharpCompletionContext.cs

@@ -90,6 +90,7 @@ private CSharpCompletionContext(ITextEditor editor, CSharpFullParseInformation p
 			this.ProjectContent = projectContent;
 			this.TypeResolveContextAtCaret = parseInfo.UnresolvedFile.GetTypeResolveContext(compilation, caretLocation);
 			this.CompletionContextProvider = new DefaultCompletionContextProvider(document, parseInfo.UnresolvedFile);
+			this.CompletionContextProvider.ConditionalSymbols.AddRange(parseInfo.SyntaxTree.ConditionalSymbols);
 		}
 	}
 }