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

chrome/browser/ui/views/constrained_window_views_browsertest.cc

Index: chrome/browser/ui/views/constrained_window_views_browsertest.cc
diff --git a/chrome/browser/ui/views/constrained_window_views_browsertest.cc b/chrome/browser/ui/views/constrained_window_views_browsertest.cc
index 6f63e2e8399fd451ace4410594b11c1d283de76f..4bbc0c2902b776ec3923b21202c40fe94174c3c6 100644
--- a/chrome/browser/ui/views/constrained_window_views_browsertest.cc
+++ b/chrome/browser/ui/views/constrained_window_views_browsertest.cc
@@ -5,6 +5,7 @@
 #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"
@@ -409,7 +410,7 @@ IN_PROC_BROWSER_TEST_F(ConstrainedWindowViewTest,
   // 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