Adding Event.Latency.Browser.WheelUI, Passing latency_info to ProcessMouse/MouseWheelEvent functions

ui/events/event_unittest.cc

Index: ui/events/event_unittest.cc
diff --git a/ui/events/event_unittest.cc b/ui/events/event_unittest.cc
index 505e626d23665a35e0aefcd337dfe68d4e0c818b..73c981f2ada25babfdbf85e5e3a01f960ef1ee4c 100644
--- a/ui/events/event_unittest.cc
+++ b/ui/events/event_unittest.cc
@@ -886,4 +886,19 @@ TEST(EventTest, PointerEventClone) {
   }
 }
 
+TEST(EventTest, MouseEventLatencyUIComponentExists) {
+  const gfx::Point origin(0, 0);
+  MouseEvent mouseev(ET_MOUSE_PRESSED, origin, origin, EventTimeForNow(), 0, 0);
+  EXPECT_TRUE(mouseev.latency()->FindLatency(
+      ui::INPUT_EVENT_LATENCY_UI_COMPONENT, 0, nullptr));
+}
+
+TEST(EventTest, MouseWheelEventLatencyUIComponentExists) {
+  const gfx::Point origin(0, 0);
+  MouseWheelEvent mouseWheelev(gfx::Vector2d(), origin, origin,
+                               EventTimeForNow(), 0, 0);
+  EXPECT_TRUE(mouseWheelev.latency()->FindLatency(
+      ui::INPUT_EVENT_LATENCY_UI_COMPONENT, 0, nullptr));
+}
+
 }  // namespace ui