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

if this gets us more accurate data on new tab times.

BUG=21398

TBR=evanm (ok'ed in person)

Review URL: http://codereview.chromium.org/257052

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@28050 0039d316-1c4b-4281-b951-d872f2087c98

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.