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

LayoutTests/fast/borders/border-hittest-inlineFlowBox-expected.txt

Index: LayoutTests/fast/borders/border-hittest-inlineFlowBox-expected.txt
diff --git a/LayoutTests/fast/borders/border-hittest-inlineFlowBox-expected.txt b/LayoutTests/fast/borders/border-hittest-inlineFlowBox-expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..20ac4ac33765005f54698fdd12ee1a8ef798bebe
--- /dev/null
+++ b/LayoutTests/fast/borders/border-hittest-inlineFlowBox-expected.txt
@@ -0,0 +1,19 @@
+Two lines with 
+a hard line break.
+BC
+DE
+If this test passes, area outside border radius is body element.
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+
+PASS elementInTopLeftCorner.nodeName is "DIV"
+PASS elementInTopLeftCorner.nodeName is "SPAN"
+PASS elementInTopLeftCorner.nodeName is "DIV"
+PASS elementInTopLeftCorner.nodeName is "BODY"
+PASS elementInTopLeftCorner.nodeName is "BODY"
+PASS elementInTopLeftCorner.nodeName is "SPAN"
+PASS successfullyParsed is true
+
+TEST COMPLETE
+