Images do not show updated when changed on disk (fixes #7951)

src/vs/workbench/common/editor/binaryEditorModel.ts

@@ -16,6 +16,7 @@ export class BinaryEditorModel extends EditorModel {
 	private name: string;
 	private resource: URI;
 	private size: number;
+	private etag: string;
 
 	constructor(
 		resource: URI,
@@ -49,8 +50,16 @@ export class BinaryEditorModel extends EditorModel {
 		return this.size;
 	}
 
+	/**
+	 * The etag of the binary file if known.
+	 */
+	public getETag(): string {
+		return this.etag;
+	}
+
 	public load(): TPromise<EditorModel> {
 		return this.fileService.resolveFile(this.resource).then(stat => {
+			this.etag = stat.etag;
 			this.size = stat.size;
 
 			return this;