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

chrome/browser/dom_ui/new_tab_ui.cc

Index: chrome/browser/dom_ui/new_tab_ui.cc
diff --git a/chrome/browser/dom_ui/new_tab_ui.cc b/chrome/browser/dom_ui/new_tab_ui.cc
index 688377ff0baea851e51f479e937d3eac125a6157..353f2241bb53b69b1e13a24a254e59199ca8418c 100644
--- a/chrome/browser/dom_ui/new_tab_ui.cc
+++ b/chrome/browser/dom_ui/new_tab_ui.cc
@@ -174,8 +174,8 @@ class PaintTimer : public RenderWidgetHost::PaintObserver {
 
  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.