No pointer captured when the pointer lock is applied

third_party/WebKit/Source/core/dom/Element.cpp

Index: third_party/WebKit/Source/core/dom/Element.cpp
diff --git a/third_party/WebKit/Source/core/dom/Element.cpp b/third_party/WebKit/Source/core/dom/Element.cpp
index af710a5670f2b3475c8303f1f71f48bc76d84b35..2e3a39a28ce2bd838d0a5e96dfbc9a894d4604a0 100644
--- a/third_party/WebKit/Source/core/dom/Element.cpp
+++ b/third_party/WebKit/Source/core/dom/Element.cpp
@@ -3074,14 +3074,21 @@ void Element::setPointerCapture(int pointer_id,
                                 ExceptionState& exception_state) {
   if (GetDocument().GetFrame()) {
     if (!GetDocument().GetFrame()->GetEventHandler().IsPointerEventActive(
-            pointer_id))
+            pointer_id)) {
       exception_state.ThrowDOMException(kInvalidPointerId, "InvalidPointerId");
-    else if (!isConnected())
+    } else if (!isConnected()) {
       exception_state.ThrowDOMException(kInvalidStateError,
                                         "InvalidStateError");
-    else
+    } else if (GetDocument().GetPage() && GetDocument()

[mustaq, 2017/05/26 14:56:18]

Nit: Combine with the above |if| with an OR, since both throw the same
exception.

[lanwei, 2017/05/29 18:30:07]

Done.

+                                              .GetPage()
+                                              ->GetPointerLockController()
+                                              .GetElement()) {
+      exception_state.ThrowDOMException(kInvalidStateError,
+                                        "InvalidStateError");
+    } else {
       GetDocument().GetFrame()->GetEventHandler().SetPointerCapture(pointer_id,
                                                                     this);
+    }
   }
 }