Up the new tab paint observer timeout from 2s to 5s. Trying to see

chrome/browser/dom_ui/new_tab_ui.cc

 // Copyright (c) 2006-2009 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 "build/build_config.h"
 
 #include "chrome/browser/dom_ui/new_tab_ui.h"
 
 #include <set>
 
@@ skipping 156 matching lines @@
       // Not enough quiet time has elapsed.
       // Some more paints must've occurred since we set the timeout.
       // Wait some more.
       timer_.Start(base::TimeDelta::FromMilliseconds(kTimeoutMs), this,
                    &PaintTimer::Timeout);
     }
   }
 
  private:
   // The amount of time there must be no painting for us to consider painting
-  // finished.  Observed times are in the ~1200ms range.
-  static const int kTimeoutMs = 2000;
+  // finished.  Observed times are in the ~1200ms range on Windows.
+  static const int kTimeoutMs = 5000;
   // The time when we started benchmarking.
   base::TimeTicks start_;
   // The last time we got a paint notification.
   base::TimeTicks last_paint_;
   // Scoping so we can be sure our timeouts don't outlive us.
   base::OneShotTimer<PaintTimer> timer_;
 
   DISALLOW_COPY_AND_ASSIGN(PaintTimer);
 };
 
@@ skipping 1578 matching lines @@
 bool NewTabUI::WebResourcesEnabled() {
   const CommandLine* command_line = CommandLine::ForCurrentProcess();
   return !command_line->HasSwitch(switches::kDisableWebResources);
 }
 
 // static
 bool NewTabUI::FirstRunDisabled() {
   const CommandLine* command_line = CommandLine::ForCurrentProcess();
   return command_line->HasSwitch(switches::kDisableNewTabFirstRun);
 }