Don't use kAdjustmentSlideY for toplevel context menus

In certain edge cases, such as on Ozone/Wayland where the context menu
size is larger than half of usable screen area's height, this might
cause the mouse pointer to be inside the context menu. This would likely
cause the user to inadvertently click on a context menu item.

Bug: 1348713
Change-Id: I4b790c27bab23b2015e2ea2b498ffc666560530b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3790917
Commit-Queue: Maksim Sisov <msisov@igalia.com>
Reviewed-by: Thomas Lukaszewicz <tluk@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1035012}

AUTHORS

@@ -929,6 +929,7 @@ Peter Molnar <pmolnar.u-szeged@partner.samsung.com>
 Peter Snyder <snyderp@gmail.com>
 Peter Varga <pvarga@inf.u-szeged.hu>
 Peter Wong <peter.wm.wong@gmail.com>
+Phan Quang Minh <phanquangminh217@gmail.com>
 Philip Hanson <philip.hanson@intel.com>
 Philipp Hancke <fippo@andyet.net>
 Philipp Hancke <philipp.hancke@googlemail.com>

ui/views/controls/menu/menu_controller.cc

@@ -3423,7 +3423,6 @@ void MenuController::SetAnchorParametersForItem(MenuItemView* item,
       anchor->anchor_gravity = ui::OwnedWindowAnchorGravity::kBottomRight;
       anchor->constraint_adjustment =
           ui::OwnedWindowConstraintAdjustment::kAdjustmentSlideX |
-          ui::OwnedWindowConstraintAdjustment::kAdjustmentSlideY |
           ui::OwnedWindowConstraintAdjustment::kAdjustmentFlipY |
           ui::OwnedWindowConstraintAdjustment::kAdjustmentRezizeY;
     } else {

ui/views/controls/menu/menu_controller_unittest.cc

@@ -2827,7 +2827,6 @@ TEST_F(MenuControllerTest, ContextMenuInitializesAuraWindowWhenShown) {
             anchor->anchor_position);
   EXPECT_EQ(ui::OwnedWindowAnchorGravity::kBottomRight, anchor->anchor_gravity);
   EXPECT_EQ((ui::OwnedWindowConstraintAdjustment::kAdjustmentSlideX |
-             ui::OwnedWindowConstraintAdjustment::kAdjustmentSlideY |
              ui::OwnedWindowConstraintAdjustment::kAdjustmentFlipY |
              ui::OwnedWindowConstraintAdjustment::kAdjustmentRezizeY),
             anchor->constraint_adjustment);