Don't force layout for mouse event hit tests

LayoutTests/touchadjustment/touch-inlines.html

Index: LayoutTests/touchadjustment/touch-inlines.html
diff --git a/LayoutTests/touchadjustment/touch-inlines.html b/LayoutTests/touchadjustment/touch-inlines.html
index f3c193fec7595e3f5e7dab3545c86510c51dfdc4..0e450550167edf36fbc045123fcb121a27101451 100644
--- a/LayoutTests/touchadjustment/touch-inlines.html
+++ b/LayoutTests/touchadjustment/touch-inlines.html
@@ -64,6 +64,8 @@
     {
         if (window.testRunner && window.internals && internals.touchNodeAdjustedToBestClickableNode) {
             description('Tests touch-adjustment on inline links. Making sure we can hit over line-breaks, and can miss when tapping between parts of a line-broken link.');
+            // Mouse events only work after an initial layout
+            document.body.offsetLeft;
             testDirectTouches();
             testDirectMisses();
             testIndirectTouches();