Clear the state of scroll and selection onmouseup

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

Index: third_party/WebKit/Source/core/input/MouseEventManager.cpp
diff --git a/third_party/WebKit/Source/core/input/MouseEventManager.cpp b/third_party/WebKit/Source/core/input/MouseEventManager.cpp
index 966780376fb1bc7464f78fdc74413cb579749d3d..8337a1ae0e458c19d44fe183777a2f83905b1603 100644
--- a/third_party/WebKit/Source/core/input/MouseEventManager.cpp
+++ b/third_party/WebKit/Source/core/input/MouseEventManager.cpp
@@ -505,6 +505,13 @@ bool MouseEventManager::SlideFocusOnShadowHostIfNecessary(
   return false;
 }
 
+void MouseEventManager::HandleMouseReleaseEventUpdateStates() {
+  ClearDragHeuristicState();
+  InvalidateClick();
+  frame_->GetEventHandler().GetSelectionController().SetMouseDownMayStartSelect(
+      false);
+}
+
 void MouseEventManager::HandleMousePressEventUpdateStates(
     const WebMouseEvent& mouse_event) {
   CancelFakeMouseMoveEvent();
@@ -522,6 +529,9 @@ void MouseEventManager::HandleMousePressEventUpdateStates(
   } else {
     InvalidateClick();
   }
+
+  frame_->GetEventHandler().GetSelectionController().SetMouseDownMayStartSelect(
+      false);
 }
 
 bool MouseEventManager::IsMousePositionUnknown() {