NewTabUITest.NTPHasThumbnails can be flakey if it takes more than

chrome/browser/dom_ui/new_tab_ui_uitest.cc

 // Copyright (c) 2009 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 "chrome/test/ui/ui_test.h"
 
 #include "chrome/app/chrome_dll_resource.h"
 #include "chrome/test/automation/browser_proxy.h"
 #include "chrome/test/automation/tab_proxy.h"
 #include "chrome/test/automation/window_proxy.h"
@@ skipping 22 matching lines @@
   // Bring up a new tab page.
   window->ApplyAccelerator(IDC_NEW_TAB);
   WaitUntilTabCount(2);
   int load_time;
   ASSERT_TRUE(automation()->WaitForInitialNewTabUILoad(&load_time));
 
   // Blank thumbnails on the NTP have the class 'filler' applied to the div.
   // If all the thumbnails load, there should be no div's with 'filler'.
   scoped_refptr<TabProxy> tab = window->GetActiveTab();
   int filler_thumbnails_count = -1;
-  ASSERT_TRUE(tab->ExecuteAndExtractInt(L"",
-      L"window.domAutomationController.send("
-      L"document.getElementsByClassName('filler').length)",
-      &filler_thumbnails_count));
+  const int kWaitDuration = 100;
+  int wait_time = action_max_timeout_ms();
+  while (wait_time > 0) {
+    ASSERT_TRUE(tab->ExecuteAndExtractInt(L"",
+        L"window.domAutomationController.send("
+        L"document.getElementsByClassName('filler').length)",
+        &filler_thumbnails_count));
+    if (filler_thumbnails_count == 0)
+      break;
+    PlatformThread::Sleep(kWaitDuration);
+    wait_time -= kWaitDuration;
+  }
   EXPECT_EQ(0, filler_thumbnails_count);
 }