Reset overscroll state when OverscrollWindowDelegate is destroyed.

content/browser/web_contents/aura/overscroll_navigation_overlay.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/web_contents/aura/overscroll_navigation_overlay.h"
 
 #include <utility>
 #include <vector>
 
 #include "base/i18n/rtl.h"
@@ skipping 233 matching lines @@
     return;
   main_window->ReleaseCapture();
 }
 
 void OverscrollNavigationOverlay::OnOverscrollCompleted(
     std::unique_ptr<aura::Window> window) {
   DCHECK(direction_ != NONE);
   aura::Window* main_window = GetMainWindow();
   if (!main_window) {
     RecordCancelled(direction_, owa_->overscroll_source());
+    direction_ = NONE;
     return;
   }
 
   main_window->SetTransform(gfx::Transform());
   window_ = std::move(window);
   // Make sure the window is in its default position.
   window_->SetBounds(gfx::Rect(web_contents_window_->bounds().size()));
   window_->SetTransform(gfx::Transform());
   // Make sure the overlay window is on top.
   web_contents_window_->StackChildAtTop(window_.get());
@@ skipping 53 matching lines @@
 
 void OverscrollNavigationOverlay::DidStopLoading() {
   // Don't compare URLs in this case - it's possible they won't match if
   // a gesture-nav initiated navigation was interrupted by some other in-site
   // navigation (e.g., from a script, or from a bookmark).
   loading_complete_ = true;
   StopObservingIfDone();
 }
 
 }  // namespace content