Reset overscroll state when OverscrollWindowDelegate is destroyed.

content/browser/web_contents/aura/overscroll_window_animation.cc

Index: content/browser/web_contents/aura/overscroll_window_animation.cc
diff --git a/content/browser/web_contents/aura/overscroll_window_animation.cc b/content/browser/web_contents/aura/overscroll_window_animation.cc
index 8ed863772f022b4b5f1e2d54008bbda2fc691bef..8c3b0bb123573a12360114267a0a861947d37e34 100644
--- a/content/browser/web_contents/aura/overscroll_window_animation.cc
+++ b/content/browser/web_contents/aura/overscroll_window_animation.cc
@@ -100,8 +100,12 @@ void OverscrollWindowAnimation::OnOverscrollModeChange(
   Direction new_direction = GetDirectionForMode(new_mode);
   if (new_direction == SLIDE_NONE) {
     // The user cancelled the in progress animation.
-    if (is_active())
+    if (is_active()) {
       CancelSlide();
+    } else {
+      overscroll_source_ = OverscrollSource::NONE;
+      direction_ = SLIDE_NONE;
+    }
     return;
   }
   if (is_active()) {