Percent height in auto height containers no longer computes as auto

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

Index: third_party/WebKit/Source/core/layout/LayoutBoxModelObject.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutBoxModelObject.cpp b/third_party/WebKit/Source/core/layout/LayoutBoxModelObject.cpp
index 8b58376fea7a9963e5de4954ef1d3a79fea323a1..12ce17b0c319397192da806f712b687abaec559a 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBoxModelObject.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutBoxModelObject.cpp
@@ -554,7 +554,8 @@ LayoutBlock* LayoutBoxModelObject::containingBlockForAutoHeightDetection(Length
 {
     // For percentage heights: The percentage is calculated with respect to the height of the generated box's
     // containing block. If the height of the containing block is not specified explicitly (i.e., it depends
-    // on content height), and this element is not absolutely positioned, the value computes to 'auto'.
+    // on content height), and this element is not absolutely positioned,  the used height is calculated
+    // as if 'auto' was specified.
     if (!logicalHeight.hasPercent() || isOutOfFlowPositioned())
         return nullptr;