[css-sizing] Ensure positive available size on replaced elements

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 eadfef9c82765fe03c6eccf06e10c2f8e1529a44..a7bb9c71841aebc0d17a8903b7ce6b8fa17c6985 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBox.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutBox.cpp
@@ -3250,13 +3250,17 @@ LayoutUnit LayoutBox::computeReplacedLogicalWidthRespectingMinMaxWidth(
     LayoutUnit logicalWidth,
     ShouldComputePreferred shouldComputePreferred) const {
   LayoutUnit minLogicalWidth = (shouldComputePreferred == ComputePreferred &&
-                                style()->logicalMinWidth().isPercentOrCalc())
+                                (style()->logicalMinWidth().isPercentOrCalc() ||
+                                 style()->logicalMinWidth().isFitContent() ||
+                                 style()->logicalMinWidth().isFillAvailable()))
                                    ? logicalWidth
                                    : computeReplacedLogicalWidthUsing(
                                          MinSize, style()->logicalMinWidth());
   LayoutUnit maxLogicalWidth =
       (shouldComputePreferred == ComputePreferred &&
-       style()->logicalMaxWidth().isPercentOrCalc()) ||
+       (style()->logicalMaxWidth().isPercentOrCalc() ||
+        style()->logicalMaxWidth().isFitContent() ||
+        style()->logicalMaxWidth().isFillAvailable())) ||

[mstensho (USE GERRIT), 2016/11/10 19:54:25]

So, what's a good term to use when you're either percent, calc, fit-content or
fill-available? :)

It would be nice to introduce a Length::isSomethingBlah() for this, but maybe we
don't need to figure it out as part of this CL.

[jfernandez, 2016/11/10 20:54:39]

If I manage to do something very simple, I think it'd make sense to do it as
part of
this CL, so the chance becomes simpler and clearer. 

               style()->logicalMaxWidth().isMaxSizeNone()
           ? logicalWidth
           : computeReplacedLogicalWidthUsing(MaxSize,