(Try 2) Update chrome://newtab checks in browser tests to use chrome::IsNTPURL().

chrome/browser/ui/views/constrained_window_views_browsertest.cc

 // Copyright (c) 2012 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 "base/memory/weak_ptr.h"
 #include "chrome/browser/platform_util.h"
 #include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/search/search.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_commands.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/browser/ui/views/constrained_window_views.h"
 #include "chrome/browser/ui/views/frame/browser_view.h"
 #include "chrome/browser/ui/webui/constrained_web_dialog_ui.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "components/web_modal/web_contents_modal_dialog_host.h"
@@ skipping 384 matching lines @@
   EXPECT_FALSE(web_contents->GetController().GetPendingEntry());
   EXPECT_EQ(about_url.spec(), web_contents->GetURL().spec());
 
   // Backspace is processed as accelerator after it's sent to web contents.
   content::RunAllPendingInMessageLoop();
   EXPECT_TRUE(web_contents->GetController().GetPendingEntry());
 
   // Wait for the navigation to commit, since the URL will not be visible
   // until then.
   back_observer.Wait();
-  EXPECT_EQ(new_tab_url.spec(), web_contents->GetURL().spec());
+  EXPECT_TRUE(chrome::IsNTPURL(web_contents->GetURL(), browser()->profile()));
 }
 
 // Fails flakily (once per 10-20 runs) on Win Aura only. http://crbug.com/177482
 // Also fails on CrOS.
 #if defined(OS_WIN) || defined(OS_CHROMEOS)
 #define MAYBE_EscapeCloseConstrainedWindow DISABLED_EscapeCloseConstrainedWindow
 #else
 #define MAYBE_EscapeCloseConstrainedWindow EscapeCloseConstrainedWindow
 #endif
 
@@ skipping 23 matching lines @@
   // Escape is not processed as accelerator before it's sent to web contents.
   EXPECT_FALSE(observer.widget_closed());
 
   content::RunAllPendingInMessageLoop();
 
   // Escape is processed as accelerator after it's sent to web contents.
   EXPECT_TRUE(observer.widget_closed());
 }
 
 #endif  // defined(OS_WIN) || (defined(USE_AURA) && defined(USE_X11))