Revert "debt - dispose one CancellationTokenSource"

This reverts commit 94aaf389.

src/vs/workbench/services/files/node/fileService.ts

@@ -278,14 +278,14 @@ export class FileService implements IFileService {
 			value: void 0
 		};
 
-		const contentResolverTokenSource = new CancellationTokenSource();
+		const contentResolverToken = new CancellationTokenSource();
 
 		const onStatError = (error: Error) => {
 
 			// error: stop reading the file the stat and content resolve call
 			// usually race, mostly likely the stat call will win and cancel
 			// the content call
-			contentResolverTokenSource.cancel();
+			contentResolverToken.cancel();
 
 			// forward error
 			return TPromise.wrapError(error);
@@ -353,21 +353,17 @@ export class FileService implements IFileService {
 		// etag from the stat before we actually read the file again.
 		if (options && options.etag) {
 			completePromise = statsPromise.then(() => {
-				return this.fillInContents(result, resource, options, contentResolverTokenSource.token); // Waterfall -> only now resolve the contents
+				return this.fillInContents(result, resource, options, contentResolverToken.token); // Waterfall -> only now resolve the contents
 			});
 		}
 
 		// a fresh load without a previous etag which means we can resolve the file stat
 		// and the content at the same time, avoiding the waterfall.
 		else {
-			completePromise = Promise.all([statsPromise, this.fillInContents(result, resource, options, contentResolverTokenSource.token)]);
+			completePromise = Promise.all([statsPromise, this.fillInContents(result, resource, options, contentResolverToken.token)]);
 		}
 
-		return TPromise.wrap(completePromise).then(() => {
-			contentResolverTokenSource.dispose();
-
-			return result;
-		});
+		return TPromise.wrap(completePromise).then(() => result);
 	}
 
 	private fillInContents(content: IStreamContent, resource: uri, options: IResolveContentOptions, token: CancellationToken): Thenable<any> {