Don't let current width affect preferred width on shrink-to-fit containers

third_party/WebKit/Source/core/layout/LayoutBox.cpp

Index: third_party/WebKit/Source/core/layout/LayoutBox.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutBox.cpp b/third_party/WebKit/Source/core/layout/LayoutBox.cpp
index 9460837de934d171b87138dd10dc175b49815f74..504df4f713d29aa844eb519047b6c5cdb7ad0ead 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBox.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutBox.cpp
@@ -2724,9 +2724,13 @@ LayoutUnit LayoutBox::computeLogicalWidthUsing(SizeType widthType,
                                 marginStart, marginEnd, toLayoutBlockFlow(cb)));
 
   if (widthType == MainOrPreferredSize &&
-      sizesLogicalWidthToFitContent(logicalWidth))
+      sizesLogicalWidthToFitContent(logicalWidth)) {
+    // Reset width so that any percent margins on inline children do not
+    // use it when calculating min/max preferred width.

[eae, 2017/04/10 05:17:57]

Would you mind filing a bug about this const_cast and adding a FIXME here?
Thanks!

+    const_cast<LayoutBox*>(this)->setLogicalWidth(LayoutUnit());
     return std::max(minPreferredLogicalWidth(),
                     std::min(maxPreferredLogicalWidth(), logicalWidthResult));
+  }
   return logicalWidthResult;
 }