1 files changed, 69 insertions, 0 deletions
diff --git a/www/firefox/files/patch-bug1423159 b/www/firefox/files/patch-bug1423159
new file mode 100644
index 000000000000..85e7148b5b91
--- /dev/null
+++ b/www/firefox/files/patch-bug1423159
@@ -0,0 +1,69 @@
+commit 6508b1194af3
+Author: Olli Pettay <Olli.Pettay@helsinki.fi>
+Date:   Sun Dec 10 14:49:49 2017 -0500
+
+    Bug 1423159 - Ensure proper multiprocess mouse enter/exit handling. r=stone, a=abillings
+    
+    --HG--
+    extra : source : 689357a9394830406290ae1fb2200521a99bd7ad
+---
+ dom/events/EventStateManager.cpp | 19 +++++++++++--------
+ 1 file changed, 11 insertions(+), 8 deletions(-)
+
+diff --git dom/events/EventStateManager.cpp dom/events/EventStateManager.cpp
+index 441036b5c5bf..f076f8ae0f09 100644
+--- dom/events/EventStateManager.cpp
++++ dom/events/EventStateManager.cpp
+@@ -4041,33 +4041,36 @@ EventStateManager::DispatchMouseOrPointerEvent(WidgetMouseEvent* aMouseEvent,
+     return nullptr;
+   }
+ 
++  nsCOMPtr<nsIContent> targetContent = aTargetContent;
++  nsCOMPtr<nsIContent> relatedContent = aRelatedContent;
++
+   nsAutoPtr<WidgetMouseEvent> dispatchEvent;
+   CreateMouseOrPointerWidgetEvent(aMouseEvent, aMessage,
+-                                  aRelatedContent, dispatchEvent);
++                                  relatedContent, dispatchEvent);
+ 
+   AutoWeakFrame previousTarget = mCurrentTarget;
+-  mCurrentTargetContent = aTargetContent;
++  mCurrentTargetContent = targetContent;
+ 
+   nsIFrame* targetFrame = nullptr;
+ 
+   nsEventStatus status = nsEventStatus_eIgnore;
+-  ESMEventCB callback(aTargetContent);
+-  EventDispatcher::Dispatch(aTargetContent, mPresContext, dispatchEvent, nullptr,
++  ESMEventCB callback(targetContent);
++  EventDispatcher::Dispatch(targetContent, mPresContext, dispatchEvent, nullptr,
+                             &status, &callback);
+ 
+   if (mPresContext) {
+     // Although the primary frame was checked in event callback, it may not be
+     // the same object after event dispatch and handling, so refetch it.
+-    targetFrame = mPresContext->GetPrimaryFrameFor(aTargetContent);
++    targetFrame = mPresContext->GetPrimaryFrameFor(targetContent);
+ 
+     // If we are entering/leaving remote content, dispatch a mouse enter/exit
+     // event to the remote frame.
+-    if (IsRemoteTarget(aTargetContent)) {
++    if (IsRemoteTarget(targetContent)) {
+       if (aMessage == eMouseOut) {
+         // For remote content, send a "top-level" widget mouse exit event.
+         nsAutoPtr<WidgetMouseEvent> remoteEvent;
+         CreateMouseOrPointerWidgetEvent(aMouseEvent, eMouseExitFromWidget,
+-                                        aRelatedContent, remoteEvent);
++                                        relatedContent, remoteEvent);
+         remoteEvent->mExitFrom = WidgetMouseEvent::eTopLevel;
+ 
+         // mCurrentTarget is set to the new target, so we must reset it to the
+@@ -4079,7 +4082,7 @@ EventStateManager::DispatchMouseOrPointerEvent(WidgetMouseEvent* aMouseEvent,
+       } else if (aMessage == eMouseOver) {
+         nsAutoPtr<WidgetMouseEvent> remoteEvent;
+         CreateMouseOrPointerWidgetEvent(aMouseEvent, eMouseEnterIntoWidget,
+-                                        aRelatedContent, remoteEvent);
++                                        relatedContent, remoteEvent);
+         HandleCrossProcessEvent(remoteEvent, &status);
+       }
+     }