Fully (?) fix overflow: auto with delayed scroll updates

third_party/WebKit/LayoutTests/css3/flexbox/overflow-auto-resizes-correctly.html

Index: third_party/WebKit/LayoutTests/css3/flexbox/overflow-auto-resizes-correctly.html
diff --git a/third_party/WebKit/LayoutTests/css3/flexbox/overflow-auto-resizes-correctly.html b/third_party/WebKit/LayoutTests/css3/flexbox/overflow-auto-resizes-correctly.html
index b031fb30ae81b686f6d9e13ce188444d1e471386..436b2d13b5afdc08c9175da6151030ae562f2618 100644
--- a/third_party/WebKit/LayoutTests/css3/flexbox/overflow-auto-resizes-correctly.html
+++ b/third_party/WebKit/LayoutTests/css3/flexbox/overflow-auto-resizes-correctly.html
@@ -19,6 +19,7 @@
 }
 .vbox {
   overflow-y: auto;
+  max-height: 200px;
 }
 .intrinsic-height-box {
   min-height: -webkit-min-content;
@@ -76,11 +77,9 @@
   var scrollbarSize = measure.offsetWidth - measure.clientWidth;
   shouldNotBe("scrollbarSize", "0");
 
-  // TODO(cbiesinger): These should really be 100 and 100 + scrollbarSize, but
-  // we currently have a bug that makes it not so.
   var inner = document.getElementById('inner');
-  shouldBe("inner.clientWidth", "100 - scrollbarSize");
-  shouldBe("inner.offsetWidth", "100");
+  shouldBe("inner.clientWidth", "100");
+  shouldBe("inner.offsetWidth", "100 + scrollbarSize");
 
   var vbox = document.querySelector('.vbox');
   shouldBe("vbox.clientWidth", "100");