Reset overscroll state when OverscrollWindowDelegate is destroyed.

content/browser/web_contents/aura/overscroll_window_delegate.cc

Index: content/browser/web_contents/aura/overscroll_window_delegate.cc
diff --git a/content/browser/web_contents/aura/overscroll_window_delegate.cc b/content/browser/web_contents/aura/overscroll_window_delegate.cc
index ac5753d147afa85abbeb4c269f7b7e68bf7538db..06c43f3f765af4fcd9643c51abfe437a099c2623 100644
--- a/content/browser/web_contents/aura/overscroll_window_delegate.cc
+++ b/content/browser/web_contents/aura/overscroll_window_delegate.cc
@@ -19,19 +19,17 @@ OverscrollWindowDelegate::OverscrollWindowDelegate(
     OverscrollControllerDelegate* delegate,
     const gfx::Image& image)
     : delegate_(delegate),
-      overscroll_mode_(OVERSCROLL_NONE),
-      delta_x_(0.f),
       complete_threshold_ratio_(content::GetOverscrollConfig(
           content::OVERSCROLL_CONFIG_HORIZ_THRESHOLD_COMPLETE)),
       start_threshold_touchscreen_(content::GetOverscrollConfig(
           content::OVERSCROLL_CONFIG_HORIZ_THRESHOLD_START_TOUCHSCREEN)),
       start_threshold_touchpad_(content::GetOverscrollConfig(
-          content::OVERSCROLL_CONFIG_HORIZ_THRESHOLD_START_TOUCHPAD)),
-      active_start_threshold_(0.f) {
+          content::OVERSCROLL_CONFIG_HORIZ_THRESHOLD_START_TOUCHPAD)) {
   SetImage(image);
 }
 
 OverscrollWindowDelegate::~OverscrollWindowDelegate() {
+  ResetOverscroll();
 }
 
 void OverscrollWindowDelegate::StartOverscroll(OverscrollSource source) {