Add throbber and status text to WebBluetooth chooser UI on non-Mac desktops

chrome/browser/chooser_controller/mock_chooser_controller.h

Index: chrome/browser/chooser_controller/mock_chooser_controller.h
diff --git a/chrome/browser/chooser_controller/mock_chooser_controller.h b/chrome/browser/chooser_controller/mock_chooser_controller.h
index 1ff9e251337604ae302bfb2b0e96e692ecd2032f..bcd972b25d4819ba90d37e3ba22e488774e8436a 100644
--- a/chrome/browser/chooser_controller/mock_chooser_controller.h
+++ b/chrome/browser/chooser_controller/mock_chooser_controller.h
@@ -17,9 +17,12 @@ class MockChooserController : public ChooserController {
   ~MockChooserController() override;
 
   // ChooserController:
+  base::string16 GetNoOptionsText() const override;
   base::string16 GetOkButtonLabel() const override;
   size_t NumOptions() const override;
   base::string16 GetOption(size_t index) const override;
+  void RefreshOptions() override;
+  base::string16 GetStatus() const override;
   MOCK_METHOD1(Select, void(size_t index));
   MOCK_METHOD0(Cancel, void());
   MOCK_METHOD0(Close, void());