[Ozone] Constrain the cursor when overscan insets are set

ui/ozone/platform/egltest/ozone_platform_egltest.cc

Index: ui/ozone/platform/egltest/ozone_platform_egltest.cc
diff --git a/ui/ozone/platform/egltest/ozone_platform_egltest.cc b/ui/ozone/platform/egltest/ozone_platform_egltest.cc
index 032f81c4790d456268adf5a25d474a94bd2285f5..2992723b671f390f0c2c1e92a52a7f2cfc4d1327 100644
--- a/ui/ozone/platform/egltest/ozone_platform_egltest.cc
+++ b/ui/ozone/platform/egltest/ozone_platform_egltest.cc
@@ -94,6 +94,7 @@ class EgltestWindow : public PlatformWindow, public PlatformEventDispatcher {
   void Restore() override;
   void SetCursor(PlatformCursor cursor) override;
   void MoveCursorTo(const gfx::Point& location) override;
+  void ConfineCursorToBounds(const gfx::Rect& bounds) override;
 
   // PlatformEventDispatcher:
   bool CanDispatchEvent(const PlatformEvent& event) override;
@@ -172,6 +173,9 @@ void EgltestWindow::MoveCursorTo(const gfx::Point& location) {
   event_factory_->WarpCursorTo(window_id_, location);
 }
 
+void EgltestWindow::ConfineCursorToBounds(const gfx::Rect& bounds) {
+}
+
 bool EgltestWindow::CanDispatchEvent(const ui::PlatformEvent& ne) {
   return true;
 }