Check the root frame pointer events as well for capture

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 21ce995d0f67a222d0160e4a6e62a6fa861c49a5..a99569be6315bdde46c84228c01f41fa43d1b754 100644
--- a/third_party/WebKit/Source/core/input/PointerEventManager.cpp
+++ b/third_party/WebKit/Source/core/input/PointerEventManager.cpp
@@ -655,6 +655,20 @@ bool PointerEventManager::isActive(const int pointerId) const {
   return m_pointerEventFactory.isActive(pointerId);
 }
 
+bool PointerEventManager::isTouchPointerIdActiveOnFrame(
+    int pointerId,
+    LocalFrame* frame) const {
+  if (m_pointerEventFactory.getPointerType(pointerId) !=

[mustaq, 2016/10/17 20:18:56]

Please add a comment about why this is Touch-only. It's easy to miss the
subtlety here given that the rest of the code /seems/ independent of
pointerType.

[Navid Zolghadr, 2016/10/18 14:18:11]

Done.

+      WebPointerProperties::PointerType::Touch)
+    return false;
+  Node* lastNodeReceivingEvent =
+      m_nodeUnderPointer.contains(pointerId)
+          ? m_nodeUnderPointer.get(pointerId).target->toNode()
+          : nullptr;
+  return lastNodeReceivingEvent &&
+         lastNodeReceivingEvent->document().frame() == frame;
+}
+
 bool PointerEventManager::isAnyTouchActive() const {
   return m_touchEventManager->isAnyTouchActive();
 }