Change hittest node to be scrollbar's parent when hittest include a scrollbar

third_party/WebKit/LayoutTests/plugins/overlay-scrollbar-mouse-capture.html

Index: third_party/WebKit/LayoutTests/plugins/overlay-scrollbar-mouse-capture.html
diff --git a/third_party/WebKit/LayoutTests/plugins/overlay-scrollbar-mouse-capture.html b/third_party/WebKit/LayoutTests/plugins/overlay-scrollbar-mouse-capture.html
index 0c7081142048e5635007293cf099f9d5628ff7c2..6e5b28b5e0d60cba5e37c81e5eac436601b253ee 100644
--- a/third_party/WebKit/LayoutTests/plugins/overlay-scrollbar-mouse-capture.html
+++ b/third_party/WebKit/LayoutTests/plugins/overlay-scrollbar-mouse-capture.html
@@ -38,11 +38,9 @@
         // element under the mouse.
         eventSender.mouseUp();
 
-        // TODO(bokan): This is wrong, if the scrollbar captures the input the
-        // plugin shouldn't be receiving events. crbug.com/636436.
-        shouldBe('eventHistory.length', '2');
-        shouldBe('eventHistory[0]', '"plugin.mousedown"');
-        shouldBe('eventHistory[1]', '"plugin.mouseup"');
+        // The scrollbar captures the input and the plugin would not receive

[bokan, 2017/04/04 15:18:01]

nit: would -> should

+        // events.
+        shouldBe('eventHistory.length', '0');
         requestAnimationFrame(function() {
           shouldBeTrue('window.scrollY > 0');
           finishJSTest();