Increase Web Bluetooth device scanning duration

chrome/browser/ui/bluetooth/bluetooth_chooser_controller.h

Index: chrome/browser/ui/bluetooth/bluetooth_chooser_controller.h
diff --git a/chrome/browser/ui/bluetooth/bluetooth_chooser_controller.h b/chrome/browser/ui/bluetooth/bluetooth_chooser_controller.h
index 64cce63199a98003ba3fd6862d52e9a8cbe4f5e3..450339d17e608fa61200a9432c93d3d99ffea90e 100644
--- a/chrome/browser/ui/bluetooth/bluetooth_chooser_controller.h
+++ b/chrome/browser/ui/bluetooth/bluetooth_chooser_controller.h
@@ -13,6 +13,8 @@
 #include <vector>
 
 #include "base/macros.h"
+#include "base/optional.h"
+#include "base/time/time.h"
 #include "chrome/browser/chooser_controller/chooser_controller.h"
 #include "content/public/browser/bluetooth_chooser.h"
 
@@ -87,6 +89,7 @@ class BluetoothChooserController : public ChooserController {
 
   content::BluetoothChooser::EventHandler event_handler_;
   base::string16 status_text_;
+  base::Optional<base::TimeTicks> scanning_start_time_;
 
   DISALLOW_COPY_AND_ASSIGN(BluetoothChooserController);
 };