Don't ignore back navigations after max entry limit is reached.

content/renderer/render_view.h

 // Copyright (c) 2011 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_RENDERER_RENDER_VIEW_H_
 #define CONTENT_RENDERER_RENDER_VIEW_H_
 #pragma once
 
 #include <deque>
 #include <map>
@@ skipping 630 matching lines @@
 
  private:
   // For unit tests.
   friend class ExternalPopupMenuTest;
   friend class PepperDeviceTest;
   friend class RenderViewTest;
 
   FRIEND_TEST_ALL_PREFIXES(ExternalPopupMenuRemoveTest, RemoveOnChange);
   FRIEND_TEST_ALL_PREFIXES(ExternalPopupMenuTest, NormalCase);
   FRIEND_TEST_ALL_PREFIXES(ExternalPopupMenuTest, ShowPopupThenNavigate);
+  FRIEND_TEST_ALL_PREFIXES(RenderViewTest, DontIgnoreBackAfterNavEntryLimit);
   FRIEND_TEST_ALL_PREFIXES(RenderViewTest, ImeComposition);
   FRIEND_TEST_ALL_PREFIXES(RenderViewTest, InsertCharacters);
   FRIEND_TEST_ALL_PREFIXES(RenderViewTest, JSBlockSentAfterPageLoad);
   FRIEND_TEST_ALL_PREFIXES(RenderViewTest, LastCommittedUpdateState);
   FRIEND_TEST_ALL_PREFIXES(RenderViewTest, OnHandleKeyboardEvent);
   FRIEND_TEST_ALL_PREFIXES(RenderViewTest, OnImeStateChanged);
   FRIEND_TEST_ALL_PREFIXES(RenderViewTest, OnNavStateChanged);
   FRIEND_TEST_ALL_PREFIXES(RenderViewTest, OnSetTextDirection);
   FRIEND_TEST_ALL_PREFIXES(RenderViewTest, StaleNavigationsIgnored);
   FRIEND_TEST_ALL_PREFIXES(RenderViewTest, UpdateTargetURLWithInvalidURL);
@@ skipping 548 matching lines @@
   // bunch of stuff, you should probably create a helper class and put your
   // data and methods on that to avoid bloating RenderView more.  You can use
   // the Observer interface to filter IPC messages and receive frame change
   // notifications.
   // ---------------------------------------------------------------------------
 
   DISALLOW_COPY_AND_ASSIGN(RenderView);
 };
 
 #endif  // CONTENT_RENDERER_RENDER_VIEW_H_