ash: ozone: apply transformation to events outside the root window

ui/ozone/platform/dri/dri_window_manager.cc

Index: ui/ozone/platform/dri/dri_window_manager.cc
diff --git a/ui/ozone/platform/dri/dri_window_manager.cc b/ui/ozone/platform/dri/dri_window_manager.cc
index 289d93061c8acc37de1487e58291e35198a85b9b..107bd9b5388e72d6ff185cd622beac9e9beceaed 100644
--- a/ui/ozone/platform/dri/dri_window_manager.cc
+++ b/ui/ozone/platform/dri/dri_window_manager.cc
@@ -20,7 +20,9 @@ gfx::PointF GetDefaultCursorLocation(DriWindow* window) {
 }  // namespace
 
 DriWindowManager::DriWindowManager(HardwareCursorDelegate* cursor_delegate)
-    : last_allocated_widget_(0), cursor_(new DriCursor(cursor_delegate, this)) {
+    : last_allocated_widget_(0),
+      cursor_(new DriCursor(cursor_delegate, this)),
+      mouse_events_grabber_(gfx::kNullAcceleratedWidget) {
 }
 
 DriWindowManager::~DriWindowManager() {
@@ -51,6 +53,8 @@ void DriWindowManager::RemoveWindow(gfx::AcceleratedWidget widget) {
 
   if (cursor_->GetCursorWindow() == widget)
     ResetCursorLocation();
+  if (mouse_events_grabber_ == widget)
+    mouse_events_grabber_ = gfx::kNullAcceleratedWidget;
 }
 
 DriWindow* DriWindowManager::GetWindow(gfx::AcceleratedWidget widget) {
@@ -74,4 +78,14 @@ void DriWindowManager::ResetCursorLocation() {
   cursor_->MoveCursorTo(cursor_widget, location);
 }
 
+void DriWindowManager::GrabMouseEvents(gfx::AcceleratedWidget widget) {
+  if (mouse_events_grabber_ == gfx::kNullAcceleratedWidget)
+    mouse_events_grabber_ = widget;
+}
+
+void DriWindowManager::UngrabMouseEvents(gfx::AcceleratedWidget widget) {
+  if (mouse_events_grabber_ == widget)
+    mouse_events_grabber_ = gfx::kNullAcceleratedWidget;
+}
+
 }  // namespace ui