Hittest for RootInlineBox/InlineFlowBox should take care of border-radius.

Source/core/layout/line/InlineFlowBox.cpp

Index: Source/core/layout/line/InlineFlowBox.cpp
diff --git a/Source/core/layout/line/InlineFlowBox.cpp b/Source/core/layout/line/InlineFlowBox.cpp
index ba754551c4e6e195dbdd2538699d3d728440992d..b9bee29f907cc2b04330bd9f79b66f0b74e4ebf3 100644
--- a/Source/core/layout/line/InlineFlowBox.cpp
+++ b/Source/core/layout/line/InlineFlowBox.cpp
@@ -975,6 +975,14 @@ bool InlineFlowBox::nodeAtPoint(const HitTestRequest& request, HitTestResult& re
     if (!locationInContainer.intersects(overflowRect))
         return false;
 
+    if (layoutObject().style()->hasBorderRadius()) {
+        LayoutRect borderRect = logicalFrameRect();
+        borderRect.moveBy(accumulatedOffset);
+        FloatRoundedRect border = layoutObject().style()->getRoundedBorderFor(borderRect, includeLogicalLeftEdge(), includeLogicalRightEdge());
+        if (!locationInContainer.intersects(border))

[davve, 2015/03/26 10:03:36]

We're heading in the right direction but it's still not quite there. We need to
consider nested inlines sticking out as well
(http://jsbin.com/bejevugilo/1/edit). BoxPainter::getBackgroundRoundedRect might
be a source of inspiration, but I don't like having to duplicate non-trivial
pieces of code. I might have to defer to an owner on the details here.

[Abhijeet Kandalkar Slow, 2015/03/27 11:28:59]

Added implementation to handle nested inlines and updated layout test too.

+            return false;
+    }
+
     // Check children first.
     // We need to account for culled inline parents of the hit-tested nodes, so that they may also get included in area-based hit-tests.
     LayoutObject* culledParent = 0;