ozone/platform/wayland: Drop WaylandWindow::GetWidget()

ui/ozone/platform/wayland/wayland_test.cc

Index: ui/ozone/platform/wayland/wayland_test.cc
diff --git a/ui/ozone/platform/wayland/wayland_test.cc b/ui/ozone/platform/wayland/wayland_test.cc
index 6fc266bc73d8007fa6636b8fd486672160f6eace..85c897da1952dd5281b3d9d61ef39a7b5e70bc70 100644
--- a/ui/ozone/platform/wayland/wayland_test.cc
+++ b/ui/ozone/platform/wayland/wayland_test.cc
@@ -4,6 +4,9 @@
 
 #include "ui/ozone/platform/wayland/wayland_test.h"
 
+using ::testing::SaveArg;
+using ::testing::_;
+
 namespace ui {
 
 WaylandTest::WaylandTest()
@@ -14,12 +17,15 @@ WaylandTest::~WaylandTest() {}
 void WaylandTest::SetUp() {
   ASSERT_TRUE(server.Start());
   ASSERT_TRUE(display.Initialize());
+  EXPECT_CALL(delegate, OnAcceleratedWidgetAvailable(_, _))
+      .WillOnce(SaveArg<0>(&widget));
   ASSERT_TRUE(window.Initialize());
+  ASSERT_NE(widget, gfx::kNullAcceleratedWidget);
   wl_display_roundtrip(display.display());
 
   server.Pause();
 
-  surface = server.GetObject<wl::MockSurface>(window.GetWidget());
+  surface = server.GetObject<wl::MockSurface>(widget);
   ASSERT_TRUE(surface);
   initialized = true;
 }