[New Multicolumn] mapAbsoluteToLocalPoint() needs to convert to flow thread coordinates.

LayoutTests/fast/multicol/event-offset-complex-tree-expected.txt

Index: LayoutTests/fast/multicol/event-offset-complex-tree-expected.txt
diff --git a/LayoutTests/fast/multicol/event-offset-complex-tree-expected.txt b/LayoutTests/fast/multicol/event-offset-complex-tree-expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..8a4844e9bbbc2a1912cb771493a6062ba9e1e289
--- /dev/null
+++ b/LayoutTests/fast/multicol/event-offset-complex-tree-expected.txt
@@ -0,0 +1,28 @@
+Dispatch mouse click events in each column and check the result.
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+
+PASS successfullyParsed is true
+
+TEST COMPLETE
+PASS event.target.id is event.expectedElementID
+PASS event.offsetX is event.expectedOffsetX
+PASS event.offsetY is event.expectedOffsetY
+PASS event.target.id is event.expectedElementID
+PASS event.offsetX is event.expectedOffsetX
+PASS event.offsetY is event.expectedOffsetY
+PASS event.target.id is event.expectedElementID
+PASS event.offsetX is event.expectedOffsetX
+PASS event.offsetY is event.expectedOffsetY
+
+
+
+first
+
+second
+
+
+third
+
+