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 7429b636a4abc761a9dcf4066584f2b47fb03950..fe468b352690ebf2daad0bcef7b78ccffa532a0f 100644
--- a/Source/core/layout/line/InlineFlowBox.cpp
+++ b/Source/core/layout/line/InlineFlowBox.cpp
@@ -975,6 +975,27 @@ 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)) {
+            // For child whose bounding box is flowing ouside it's parent border.
+            bool hasChildAtPoint = false;
+            for (InlineBox* curr = lastChild(); curr; curr = curr->prevOnLine()) {

[davve, 2015/03/27 12:40:20]

Instead of having a loop here and a preliminary hit-test, could we instead move
this entire check to somewhere around the "Now check ourselves." part of the
function? The idea being that we have already ruled out hitting children by
then.

[Abhijeet Kandalkar Slow, 2015/03/27 13:08:26]

Done.

+                LayoutRect absoluteRect = curr->logicalFrameRect();
+                absoluteRect.moveBy(accumulatedOffset);
+                if (locationInContainer.intersects(absoluteRect)) {
+                    hasChildAtPoint = true;
+                    break;
+                }
+            }
+
+            if (!hasChildAtPoint)
+                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;