[Ozone] Constrain the cursor when overscan insets are set

ui/ozone/platform/dri/dri_cursor.h

Index: ui/ozone/platform/dri/dri_cursor.h
diff --git a/ui/ozone/platform/dri/dri_cursor.h b/ui/ozone/platform/dri/dri_cursor.h
index 755393a073d6aa85b0c7e38abe1fb3b9741671f9..c93d6496cd0d5b17fd4ca39db07c49138502fb1f 100644
--- a/ui/ozone/platform/dri/dri_cursor.h
+++ b/ui/ozone/platform/dri/dri_cursor.h
@@ -46,8 +46,10 @@ class DriCursor : public CursorDelegateEvdev, public GpuPlatformSupportHost {
 
   // Handle window bounds changes.
   void PrepareForBoundsChange(gfx::AcceleratedWidget window);
-  void CommitBoundsChange(gfx::AcceleratedWidget window,
-                          const gfx::Rect& bounds);
+
+  // Confines the cursor to |confined_bounds| for |window|.
+  void ConfineCursorToBounds(gfx::AcceleratedWidget window,
+                             const gfx::Rect& bounds);
 
   // CursorDelegateEvdev:
   void MoveCursorTo(gfx::AcceleratedWidget window,
@@ -56,7 +58,7 @@ class DriCursor : public CursorDelegateEvdev, public GpuPlatformSupportHost {
   void MoveCursor(const gfx::Vector2dF& delta) override;
   bool IsCursorVisible() override;
   gfx::PointF GetLocation() override;
-  gfx::Rect GetCursorDisplayBounds() override;
+  gfx::Rect GetCursorConfinedBounds() override;
 
   // GpuPlatformSupportHost:
   void OnChannelEstablished(
@@ -102,7 +104,10 @@ class DriCursor : public CursorDelegateEvdev, public GpuPlatformSupportHost {
     gfx::PointF location;
 
     // The bounds of the display under the cursor.
-    gfx::Rect bounds;
+    gfx::Rect display_bounds_in_screen;
+
+    // The bounds that the cursor is confined to in |window|.
+    gfx::Rect confined_bounds;
 
     // Callback for IPC updates.
     base::Callback<void(IPC::Message*)> send_callback;