Update to latest dart_style.

[email protected]

Review URL: https://codereview.chromium.org//1266913002 .

Author: munificent

CHANGELOG.md

@@ -79,6 +79,13 @@
 
 [package spec proposal]: https://github.com/lrhn/dep-pkgspec
 
+* Formatter (`dartfmt`)
+
+  * Over 50 bugs fixed.
+
+  * Optimized line splitter is much faster and produces better output on
+    complex code.
+
 ### VM Service Protocol Changes
 
 * **BREAKING** The service protocol now sends JSON-RPC 2.0-compatible

DEPS

@@ -51,7 +51,7 @@ vars = {
   "csslib_tag" : "@0.12.0",
   "dartdoc_tag" : "@v0.1.0+5",
   "dart_services_rev" : "@7aea2574e6f3924bf409a80afb8ad52aa2be4f97",
-  "dart_style_tag": "@0.1.8+2",
+  "dart_style_tag": "@0.2.0",
   "dev_compiler_rev": "@0.1.3",
   "fake_async_rev" : "@38614",
   "firefox_jsshell_rev" : "@45554",