Gesture Nav: Protect against the case when navigation completes as soon as it is requested.

content/browser/web_contents/aura/overscroll_navigation_overlay.h

 // 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.
 
 #ifndef CONTENT_BROWSER_WEB_CONTENTS_AURA_OVERSCROLL_NAVIGATION_OVERLAY_H_
 #define CONTENT_BROWSER_WEB_CONTENTS_AURA_OVERSCROLL_NAVIGATION_OVERLAY_H_
 
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "content/browser/web_contents/aura/overscroll_window_animation.h"
@@ skipping 40 matching lines @@
   friend class OverscrollNavigationOverlayTest;
   FRIEND_TEST_ALL_PREFIXES(OverscrollNavigationOverlayTest, WithScreenshot);
   FRIEND_TEST_ALL_PREFIXES(OverscrollNavigationOverlayTest, WithoutScreenshot);
   FRIEND_TEST_ALL_PREFIXES(OverscrollNavigationOverlayTest, CannotNavigate);
   FRIEND_TEST_ALL_PREFIXES(OverscrollNavigationOverlayTest, CancelNavigation);
   FRIEND_TEST_ALL_PREFIXES(OverscrollNavigationOverlayTest,
                            CancelAfterSuccessfulNavigation);
   FRIEND_TEST_ALL_PREFIXES(OverscrollNavigationOverlayTest, OverlayWindowSwap);
   FRIEND_TEST_ALL_PREFIXES(OverscrollNavigationOverlayTest,
                            CloseDuringAnimation);
+  FRIEND_TEST_ALL_PREFIXES(OverscrollNavigationOverlayTest,
+                           ImmediateLoadOnNavigate);
 
   // Resets state and starts observing |web_contents_| for page load/paint
   // updates. This function makes sure that the screenshot window is stacked
   // on top, so that it hides the content window behind it, and destroys the
   // screenshot window when the page is done loading/painting.
   // This should be called immediately after initiating the navigation,
   // otherwise the overlay may be dismissed prematurely.
   void StartObserving();
 
   // Stop observing the page and start the final overlay fade-out animation if
@@ skipping 45 matching lines @@
 
   // The window that hosts the web contents.
   aura::Window* web_contents_window_;
 
   DISALLOW_COPY_AND_ASSIGN(OverscrollNavigationOverlay);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_WEB_CONTENTS_AURA_OVERSCROLL_NAVIGATION_OVERLAY_H_