ui/events: Add changed_button_flags_ in ui::PointerEvent.

ui/views/mus/pointer_watcher_event_router_unittest.cc

Index: ui/views/mus/pointer_watcher_event_router_unittest.cc
diff --git a/ui/views/mus/pointer_watcher_event_router_unittest.cc b/ui/views/mus/pointer_watcher_event_router_unittest.cc
index 4dd31442bf6ae488210f901803fd2df26d55f27a..d7e0115e4764d7792b9cb7e6345e36919103b028 100644
--- a/ui/views/mus/pointer_watcher_event_router_unittest.cc
+++ b/ui/views/mus/pointer_watcher_event_router_unittest.cc
@@ -124,11 +124,11 @@ TEST_F(PointerWatcherEventRouterTest, PointerWatcherNoMove) {
   ASSERT_TRUE(pointer_watcher_event_router);
 
   ui::PointerEvent pointer_event_down(
-      ui::ET_POINTER_DOWN, gfx::Point(), gfx::Point(), ui::EF_NONE, 1,
+      ui::ET_POINTER_DOWN, gfx::Point(), gfx::Point(), ui::EF_NONE, 1, 0,
       ui::PointerDetails(ui::EventPointerType::POINTER_TYPE_TOUCH),
       base::TimeTicks());
   ui::PointerEvent pointer_event_up(
-      ui::ET_POINTER_UP, gfx::Point(), gfx::Point(), ui::EF_NONE, 1,
+      ui::ET_POINTER_UP, gfx::Point(), gfx::Point(), ui::EF_NONE, 1, 0,
       ui::PointerDetails(ui::EventPointerType::POINTER_TYPE_MOUSE),
       base::TimeTicks());
 
@@ -177,11 +177,11 @@ TEST_F(PointerWatcherEventRouterTest, PointerWatcherMove) {
   ASSERT_TRUE(pointer_watcher_event_router);
 
   ui::PointerEvent pointer_event_down(
-      ui::ET_POINTER_DOWN, gfx::Point(), gfx::Point(), ui::EF_NONE, 1,
+      ui::ET_POINTER_DOWN, gfx::Point(), gfx::Point(), ui::EF_NONE, 1, 0,
       ui::PointerDetails(ui::EventPointerType::POINTER_TYPE_TOUCH),
       base::TimeTicks());
   ui::PointerEvent pointer_event_move(
-      ui::ET_POINTER_MOVED, gfx::Point(), gfx::Point(), ui::EF_NONE, 1,
+      ui::ET_POINTER_MOVED, gfx::Point(), gfx::Point(), ui::EF_NONE, 1, 0,
       ui::PointerDetails(ui::EventPointerType::POINTER_TYPE_TOUCH),
       base::TimeTicks());