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 09e25fba6252ed4271f5a51e57147edf8e75f83d..a4d83f0ba1024f63e1c792a2ad17cdd889aa0090 100644
--- a/ui/events/event_unittest.cc
+++ b/ui/events/event_unittest.cc
@@ -887,6 +887,21 @@ 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));
+}
+
 TEST(EventTest, PointerEventToMouseEvent) {
   const struct {
     ui::EventType in_type;
@@ -1009,5 +1024,4 @@ TEST(EventTest, EventLatencyOSMouseWheelHistogram) {
 #endif
 }
 
-
 }  // namespace ui