Add a histogram to measure browser window display

chrome/browser/ui/views/simple_message_box_win.cc

Index: chrome/browser/ui/views/simple_message_box_win.cc
diff --git a/chrome/browser/ui/views/simple_message_box_win.cc b/chrome/browser/ui/views/simple_message_box_win.cc
index 30930a9dc054a7c0e1aec985a54927ae988d2b95..bb173b9ad552c629621e1ca8348e35b14238846c 100644
--- a/chrome/browser/ui/views/simple_message_box_win.cc
+++ b/chrome/browser/ui/views/simple_message_box_win.cc
@@ -4,6 +4,7 @@
 
 #include "chrome/browser/ui/simple_message_box.h"
 
+#include "chrome/common/startup_metric_utils.h"
 #include "ui/base/win/message_box_win.h"
 
 namespace chrome {
@@ -12,6 +13,8 @@ MessageBoxResult ShowMessageBox(gfx::NativeWindow parent,
                                 const string16& title,
                                 const string16& message,
                                 MessageBoxType type) {
+  startup_metric_utils::SetNonBrowserUIDisplayed();
+
   UINT flags = MB_SETFOREGROUND;
   flags |= ((type == MESSAGE_BOX_TYPE_QUESTION) ? MB_YESNO : MB_OK);
   flags |= ((type == MESSAGE_BOX_TYPE_INFORMATION) ?