Add UMA for the number of devices in the chooser when a device is paired

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 6a6a0d657ef98836c12be3137cb7438f6f4f05b1..609d8f33d198f5b381a9eb1acdbf7e984a65adf7 100644
--- a/chrome/browser/ui/bluetooth/bluetooth_chooser_controller.h
+++ b/chrome/browser/ui/bluetooth/bluetooth_chooser_controller.h
@@ -22,9 +22,10 @@
 // access a Bluetooth device. It is owned by ChooserBubbleDelegate.
 class BluetoothChooserController : public ChooserController {
  public:
-  explicit BluetoothChooserController(
+  BluetoothChooserController(
       content::RenderFrameHost* owner,
-      const content::BluetoothChooser::EventHandler& event_handler);
+      const content::BluetoothChooser::EventHandler& event_handler,
+      bool accept_all_devices);
   ~BluetoothChooserController() override;
 
   // ChooserController:
@@ -87,6 +88,7 @@ class BluetoothChooserController : public ChooserController {
 
   content::BluetoothChooser::EventHandler event_handler_;
   base::string16 status_text_;
+  bool accept_all_devices_;
 
   DISALLOW_COPY_AND_ASSIGN(BluetoothChooserController);
 };