Don't update the logical width when a scrollbar gets added

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 fba0716229e34ea0929c9ffce632691ea6a260b3..b7cf506354bcb6ddcbdde3fe5e43368d5cb23e6c 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
@@ -51,6 +51,11 @@
   </div>
 </div>
 
+<!-- This div is only for measuring scrollbar size -->
+<div id="measure" style="height: 100px; width: 100px; display: inline-box; overflow: auto;">
+  <div style="min-height: 300px;"></div>
+</div>
+
 <script>
   description("When a block inside a flexbox adds scrollbars due to overflow, the parent flexbox should re-flex based on the child size including scrollbars.");
 
@@ -60,8 +65,10 @@
   var intrinsicHeightBox = document.querySelector('.intrinsic-height-box');
   shouldBe("intrinsicHeightBox.clientHeight", "intrinsicHeightBox.scrollHeight");
 
-  // This is expected to fail; see:
-  //   https://codereview.chromium.org/1295933003/#msg1
+  var measure = document.getElementById('measure');
+  var scrollbarSize = measure.offsetWidth - measure.clientWidth;
+  shouldNotBe("scrollbarSize", "0");
+
   var vbox = document.querySelector('.vbox');
-  shouldBe("vbox.clientWidth", "vbox.scrollWidth");
+  shouldBe("vbox.clientWidth", "100 - scrollbarSize");
 </script>