[Ozone] Constrain the cursor when overscan insets are set

ui/ozone/platform/dri/dri_window.cc

Index: ui/ozone/platform/dri/dri_window.cc
diff --git a/ui/ozone/platform/dri/dri_window.cc b/ui/ozone/platform/dri/dri_window.cc
index 9796d137d9e7d749bd2e274de23f52feefefe7eb..1973890585a935222db9c6ce3590607dafd70687 100644
--- a/ui/ozone/platform/dri/dri_window.cc
+++ b/ui/ozone/platform/dri/dri_window.cc
@@ -50,7 +50,7 @@ DriWindow::~DriWindow() {
 void DriWindow::Initialize() {
   sender_->AddChannelObserver(this);
   PlatformEventSource::GetInstance()->AddPlatformEventDispatcher(this);
-  cursor_->OnWindowAdded(widget_, bounds_);
+  cursor_->OnWindowAdded(widget_, bounds_, GetCursorConfinedBounds());
   delegate_->OnAcceleratedWidgetAvailable(widget_);
 }
 
@@ -58,6 +58,11 @@ gfx::AcceleratedWidget DriWindow::GetAcceleratedWidget() {
   return widget_;
 }
 
+gfx::Rect DriWindow::GetCursorConfinedBounds() const {
+  return cursor_confined_bounds_.IsEmpty() ? gfx::Rect(bounds_.size())
+                                           : cursor_confined_bounds_;
+}
+
 void DriWindow::Show() {}
 
 void DriWindow::Hide() {}
@@ -98,6 +103,14 @@ void DriWindow::MoveCursorTo(const gfx::Point& location) {
   event_factory_->WarpCursorTo(widget_, location);
 }
 
+void DriWindow::ConfineCursorToBounds(const gfx::Rect& bounds) {
+  if (cursor_confined_bounds_ == bounds)
+    return;
+
+  cursor_confined_bounds_ = bounds;
+  cursor_->ConfineCursorToBounds(widget_, bounds);
+}
+
 bool DriWindow::CanDispatchEvent(const PlatformEvent& ne) {
   DCHECK(ne);
   Event* event = static_cast<Event*>(ne);
@@ -156,6 +169,7 @@ uint32_t DriWindow::DispatchEvent(const PlatformEvent& native_event) {
 void DriWindow::OnChannelEstablished() {
   sender_->Send(new OzoneGpuMsg_CreateWindowDelegate(widget_));
   SendBoundsChange();
+  cursor_->ConfineCursorToBounds(widget_, GetCursorConfinedBounds());
 }
 
 void DriWindow::OnChannelDestroyed() {
@@ -164,7 +178,6 @@ void DriWindow::OnChannelDestroyed() {
 void DriWindow::SendBoundsChange() {
   cursor_->PrepareForBoundsChange(widget_);
   sender_->Send(new OzoneGpuMsg_WindowBoundsChanged(widget_, bounds_));
-  cursor_->CommitBoundsChange(widget_, bounds_);
 }
 
 }  // namespace ui