Allow compositor server to resize the menu when necessary

This allow the menu to resize, which in turn will enable scrolling
so that a user can use all menu options.

I'll work on a wrap around behavior in a separate CL.

Bug: 1099880
Change-Id: If2f92894fb25684f12dd0f232758f9b968c8e0ad
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2542854
Commit-Queue: Mitsuru Oshima <oshima@chromium.org>
Reviewed-by: Antonio Gomes <tonikitoo@igalia.com>
Cr-Commit-Position: refs/heads/master@{#828558}

ui/ozone/platform/wayland/host/wayland_window_unittest.cc

@@ -1408,26 +1408,29 @@ TEST_P(WaylandWindowTest, AdjustPopupBounds) {
         ZXDG_POSITIONER_V6_ANCHOR_BOTTOM | ZXDG_POSITIONER_V6_ANCHOR_RIGHT,
         ZXDG_POSITIONER_V6_GRAVITY_BOTTOM | ZXDG_POSITIONER_V6_GRAVITY_RIGHT,
         ZXDG_POSITIONER_V6_CONSTRAINT_ADJUSTMENT_SLIDE_X |
-            ZXDG_POSITIONER_V6_CONSTRAINT_ADJUSTMENT_FLIP_Y};
+            ZXDG_POSITIONER_V6_CONSTRAINT_ADJUSTMENT_FLIP_Y |
+            ZXDG_POSITIONER_V6_CONSTRAINT_ADJUSTMENT_RESIZE_Y};
 
     nested_menu_window_positioner = {
         gfx::Rect(4, 80, 279, 1), gfx::Size(305, 99),
         ZXDG_POSITIONER_V6_ANCHOR_TOP | ZXDG_POSITIONER_V6_ANCHOR_RIGHT,
         ZXDG_POSITIONER_V6_GRAVITY_BOTTOM | ZXDG_POSITIONER_V6_GRAVITY_RIGHT,
         ZXDG_POSITIONER_V6_CONSTRAINT_ADJUSTMENT_FLIP_X |
-            ZXDG_POSITIONER_V6_CONSTRAINT_ADJUSTMENT_SLIDE_Y};
+            ZXDG_POSITIONER_V6_CONSTRAINT_ADJUSTMENT_SLIDE_Y |
+            ZXDG_POSITIONER_V6_CONSTRAINT_ADJUSTMENT_RESIZE_Y};
   } else {
-    menu_window_positioner = {gfx::Rect(439, 46, 1, 30), gfx::Size(287, 409),
-                              XDG_POSITIONER_ANCHOR_BOTTOM_RIGHT,
-                              XDG_POSITIONER_GRAVITY_BOTTOM_RIGHT,
-                              XDG_POSITIONER_CONSTRAINT_ADJUSTMENT_SLIDE_X |
-                                  XDG_POSITIONER_CONSTRAINT_ADJUSTMENT_FLIP_Y};
-
+    menu_window_positioner = {
+        gfx::Rect(439, 46, 1, 30), gfx::Size(287, 409),
+        XDG_POSITIONER_ANCHOR_BOTTOM_RIGHT, XDG_POSITIONER_GRAVITY_BOTTOM_RIGHT,
+        XDG_POSITIONER_CONSTRAINT_ADJUSTMENT_SLIDE_X |
+            XDG_POSITIONER_CONSTRAINT_ADJUSTMENT_FLIP_Y |
+            XDG_POSITIONER_CONSTRAINT_ADJUSTMENT_RESIZE_Y};
     nested_menu_window_positioner = {
         gfx::Rect(4, 80, 279, 1), gfx::Size(305, 99),
         XDG_POSITIONER_ANCHOR_TOP_RIGHT, XDG_POSITIONER_GRAVITY_BOTTOM_RIGHT,
         XDG_POSITIONER_CONSTRAINT_ADJUSTMENT_FLIP_X |
-            XDG_POSITIONER_CONSTRAINT_ADJUSTMENT_SLIDE_Y};
+            XDG_POSITIONER_CONSTRAINT_ADJUSTMENT_SLIDE_Y |
+            XDG_POSITIONER_CONSTRAINT_ADJUSTMENT_RESIZE_Y};
   }
 
   auto* toplevel_window = window_.get();

ui/ozone/platform/wayland/host/xdg_popup_wrapper_impl.cc

@@ -236,17 +236,19 @@ uint32_t GetConstraintAdjustment(MenuType menu_type, bool stable) {
 
   switch (menu_type) {
     case MenuType::TYPE_RIGHT_CLICK:
-      constraint = WlConstraintAdjustment::SlideX |
-                   WlConstraintAdjustment::SlideY |
-                   WlConstraintAdjustment::FlipY;
+      constraint =
+          WlConstraintAdjustment::SlideX | WlConstraintAdjustment::SlideY |
+          WlConstraintAdjustment::FlipY | WlConstraintAdjustment::ResizeY;
       break;
     case MenuType::TYPE_3DOT_PARENT_MENU:
-      constraint =
-          WlConstraintAdjustment::SlideX | WlConstraintAdjustment::FlipY;
+      constraint = WlConstraintAdjustment::SlideX |
+                   WlConstraintAdjustment::FlipY |
+                   WlConstraintAdjustment::ResizeY;
       break;
     case MenuType::TYPE_3DOT_CHILD_MENU:
-      constraint =
-          WlConstraintAdjustment::SlideY | WlConstraintAdjustment::FlipX;
+      constraint = WlConstraintAdjustment::SlideY |
+                   WlConstraintAdjustment::FlipX |
+                   WlConstraintAdjustment::ResizeY;
       break;
     case MenuType::TYPE_UNKNOWN:
       NOTREACHED() << "Unsupported menu type";