No pointer captured when the pointer lock is applied

third_party/WebKit/Source/core/input/PointerEventManager.cpp

Index: third_party/WebKit/Source/core/input/PointerEventManager.cpp
diff --git a/third_party/WebKit/Source/core/input/PointerEventManager.cpp b/third_party/WebKit/Source/core/input/PointerEventManager.cpp
index 3008398da7fec124070ee00ff75e309bcb4053fd..e9e0f4a3aeac9e8011e9dcb583f77e35e8dc49dc 100644
--- a/third_party/WebKit/Source/core/input/PointerEventManager.cpp
+++ b/third_party/WebKit/Source/core/input/PointerEventManager.cpp
@@ -607,6 +607,25 @@ void PointerEventManager::ProcessPendingPointerCapture(
   }
 }
 
+void PointerEventManager::DispatchLostPointerCaptureEvent(
+    const WebMouseEvent& mouse_event,
+    const Vector<WebMouseEvent>& coalesced_events) {
+  PointerEvent* pointer_event = pointer_event_factory_.Create(
+      EventTypeNames::mousemove, mouse_event, coalesced_events,
+      frame_->GetDocument()->domWindow());
+  if (EventTarget* capturing_target =
+          GetCapturingNode(pointer_event->pointerId())) {
+    if (capturing_target->ToNode() &&
+        !capturing_target->ToNode()->isConnected()) {
+      capturing_target = capturing_target->ToNode()->ownerDocument();
+    }
+    DispatchPointerEvent(
+        capturing_target,
+        pointer_event_factory_.CreatePointerCaptureEvent(
+            pointer_event, EventTypeNames::lostpointercapture));
+  }
+}
+
 void PointerEventManager::RemoveTargetFromPointerCapturingMapping(
     PointerCapturingMap& map,
     const EventTarget* target) {
@@ -666,6 +685,10 @@ void PointerEventManager::ReleasePointerCapture(int pointer_id,
     ReleasePointerCapture(pointer_id);
 }
 
+void PointerEventManager::ReleaseMousePointerCapture() {
+  ReleasePointerCapture(PointerEventFactory::kMouseId);
+}
+
 bool PointerEventManager::HasPointerCapture(int pointer_id,
                                             const EventTarget* target) const {
   return pending_pointer_capture_target_.at(pointer_id) == target;