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..e53c523c0404136cd97f848aa6c58dec6e34b9b5 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"

[xiyuan, 2016/09/16 20:07:54]

ditto. Need to decide whether this is chormeos-only and if yes, need to be
wrapped under #if defined(OS_CHROMEOS).

[xiaoyinh(OOO Sep 11-29), 2016/09/16 22:34:25]

Wrapped under OS_CHROMEOS

 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/browser_window_state.h"
@@ -98,6 +99,9 @@ void BrowserFrame::InitBrowserFrame() {
   }
 
   Init(params);
+  browser_view_->GetNativeWindow()->SetProperty(
+      chromeos::kStylusWindowTypeBucket,
+      chromeos::StylusWindowType::WINDOW_TYPE_BROWSER_WINDOW);
 
   if (!native_browser_frame_->UsesNativeSystemMenu()) {
     DCHECK(non_client_view());