[Ozone] Constrain the cursor when overscan insets are set

ui/ozone/platform/dri/dri_window.h

Index: ui/ozone/platform/dri/dri_window.h
diff --git a/ui/ozone/platform/dri/dri_window.h b/ui/ozone/platform/dri/dri_window.h
index cc6b9c54757f508ee88407d49f0ac603b0a7ca34..5d5072d78cbacd3511149ca02d31f28eceb099f6 100644
--- a/ui/ozone/platform/dri/dri_window.h
+++ b/ui/ozone/platform/dri/dri_window.h
@@ -39,6 +39,8 @@ class DriWindow : public PlatformWindow,
 
   gfx::AcceleratedWidget GetAcceleratedWidget();
 
+  gfx::Rect GetCursorConfinedBounds() const;
+
   // PlatformWindow:
   void Show() override;
   void Hide() override;
@@ -53,6 +55,7 @@ class DriWindow : public PlatformWindow,
   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;
@@ -75,6 +78,8 @@ class DriWindow : public PlatformWindow,
   gfx::Rect bounds_;
   gfx::AcceleratedWidget widget_;
 
+  gfx::Rect cursor_confined_bounds_;
+
   DISALLOW_COPY_AND_ASSIGN(DriWindow);
 };