Expand tap highlight to allow multiple highlights for touch disambiguation.

Source/core/page/TouchDisambiguation.cpp

Index: Source/core/page/TouchDisambiguation.cpp
diff --git a/Source/core/page/TouchDisambiguation.cpp b/Source/core/page/TouchDisambiguation.cpp
index 4cab1f50e6cce83128c82af68bba715dfebfdadf..6638ce39c960a3e2cfc2c255885afde389cdd929 100644
--- a/Source/core/page/TouchDisambiguation.cpp
+++ b/Source/core/page/TouchDisambiguation.cpp
@@ -88,7 +88,7 @@ struct TouchTargetData {
     float score;
 };
 
-void findGoodTouchTargets(const IntRect& touchBox, Frame* mainFrame, Vector<IntRect>& goodTargets)
+void findGoodTouchTargets(const IntRect& touchBox, Frame* mainFrame, Vector<IntRect>& goodTargets, Vector<Node*>& highlightNodes)
 {
     goodTargets.clear();
 
@@ -144,6 +144,7 @@ void findGoodTouchTargets(const IntRect& touchBox, Frame* mainFrame, Vector<IntR
         if (it->value.score < bestScore * 0.5)
             continue;
         goodTargets.append(it->value.windowBoundingBox);
+        highlightNodes.append(it->key);
     }
 }