UMA stats for stylus usage

chrome/browser/ui/views/frame/browser_frame.cc

Index: chrome/browser/ui/views/frame/browser_frame.cc
diff --git a/chrome/browser/ui/views/frame/browser_frame.cc b/chrome/browser/ui/views/frame/browser_frame.cc
index 2cbb1850d2cc9227c5a68f16dd03fb9444b420f8..006ce0dcec9d6738bdf4e3f787bf8ca7fd51a69a 100644
--- a/chrome/browser/ui/views/frame/browser_frame.cc
+++ b/chrome/browser/ui/views/frame/browser_frame.cc
@@ -13,6 +13,7 @@
 #include "chrome/browser/app_mode/app_mode_utils.h"
 #include "chrome/browser/themes/theme_service.h"
 #include "chrome/browser/themes/theme_service_factory.h"
+#include "chrome/browser/ui/ash/metrics/stylus_metrics_recorder.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/browser_window_state.h"
@@ -25,6 +26,7 @@
 #include "chrome/browser/ui/views/frame/system_menu_model_builder.h"
 #include "chrome/browser/ui/views/frame/top_container_view.h"
 #include "chrome/common/chrome_switches.h"
+#include "ui/aura/client/aura_constants.h"
 #include "ui/base/hit_test.h"
 #include "ui/events/event_handler.h"
 #include "ui/gfx/font_list.h"
@@ -98,6 +100,9 @@ void BrowserFrame::InitBrowserFrame() {
   }
 
   Init(params);
+  browser_view_->GetNativeWindow()->SetProperty(
+      aura::client::kStylusWindowTypeBucket,
+      static_cast<int>(chromeos::StylusWindowType::WINDOW_TYPE_BROWSER_WINDOW));
 
   if (!native_browser_frame_->UsesNativeSystemMenu()) {
     DCHECK(non_client_view());