Add test for WebBluetooth chooser spinner, status text and rescan button

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 bcd972b25d4819ba90d37e3ba22e488774e8436a..718137097761026082fea6d6efa74f1b802a58f3 100644
--- a/chrome/browser/chooser_controller/mock_chooser_controller.h
+++ b/chrome/browser/chooser_controller/mock_chooser_controller.h
@@ -21,18 +21,28 @@ class MockChooserController : public ChooserController {
   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_METHOD0(RefreshOptions, void());
   MOCK_METHOD1(Select, void(size_t index));
   MOCK_METHOD0(Cancel, void());
   MOCK_METHOD0(Close, void());
   MOCK_CONST_METHOD0(OpenHelpCenterUrl, void());
 
+  enum class AdapterPresence { OFF, ON };
+  void OnAdapterPresenceChanged(AdapterPresence presence);
+
+  enum class DiscoveryState { DISCOVERING, IDLE };
+  void OnDiscoveryStateChanged(DiscoveryState state);
+
   void OptionAdded(const base::string16 option_name);
   void OptionRemoved(const base::string16 option_name);
 
  private:
+  void ClearAllOptions();
+
   std::vector<base::string16> option_names_;
+  base::string16 no_options_text_;
+  base::string16 status_text_;
 
   DISALLOW_COPY_AND_ASSIGN(MockChooserController);
 };