Add UseCounter for flex items having intinsic aspect ratios

Source/core/rendering/RenderFlexibleBox.cpp

Index: Source/core/rendering/RenderFlexibleBox.cpp
diff --git a/Source/core/rendering/RenderFlexibleBox.cpp b/Source/core/rendering/RenderFlexibleBox.cpp
index 3f8b11f277a7e2958ce106052f8679f2fd632936..ce694f8df7ad0e4e8eeeda9957e2ee2eeb00bd43 100644
--- a/Source/core/rendering/RenderFlexibleBox.cpp
+++ b/Source/core/rendering/RenderFlexibleBox.cpp
@@ -31,6 +31,7 @@
 #include "config.h"
 #include "core/rendering/RenderFlexibleBox.h"
 
+#include "core/frame/UseCounter.h"
 #include "core/rendering/FastTextAutosizer.h"
 #include "core/rendering/RenderLayer.h"
 #include "core/rendering/RenderView.h"
@@ -612,6 +613,9 @@ LayoutUnit RenderFlexibleBox::preferredMainAxisContentExtentForChild(RenderBox*
 {
     child->clearOverrideSize();
 
+    if (child->style()->hasAspectRatio() || child->isImage() || child->isVideo() || child->isCanvas())
+        UseCounter::count(document(), UseCounter::AspectRatioFlexItem);
+
     Length flexBasis = flexBasisForChild(child);
     if (preferredMainAxisExtentDependsOnLayout(flexBasis, hasInfiniteLineLength)) {
         LayoutUnit mainAxisExtent;