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

chrome/browser/ui/bluetooth/bluetooth_chooser_controller.cc

Index: chrome/browser/ui/bluetooth/bluetooth_chooser_controller.cc
diff --git a/chrome/browser/ui/bluetooth/bluetooth_chooser_controller.cc b/chrome/browser/ui/bluetooth/bluetooth_chooser_controller.cc
index 173fc18848dd1fe1d4f904dd4b9abd51616ab0e2..3ba917bdd5198a24764b57dbc5dda4f6754f8f4b 100644
--- a/chrome/browser/ui/bluetooth/bluetooth_chooser_controller.cc
+++ b/chrome/browser/ui/bluetooth/bluetooth_chooser_controller.cc
@@ -57,6 +57,19 @@ base::string16 BluetoothChooserController::GetOption(size_t index) const {
                    base::UTF8ToUTF16(device_names_and_ids_[index].second));
 }
 
+void BluetoothChooserController::RefreshOptions() {
+  ClearAllDevices();
+  event_handler_.Run(content::BluetoothChooser::Event::RESCAN, std::string());
+}
+
+bool BluetoothChooserController::NeedsThrobber() const {
+  return true;
+}
+
+bool BluetoothChooserController::NeedsStatus() const {
+  return true;
+}
+
 void BluetoothChooserController::Select(size_t index) {
   DCHECK_LT(index, device_names_and_ids_.size());
   event_handler_.Run(content::BluetoothChooser::Event::SELECTED,
@@ -80,6 +93,38 @@ void BluetoothChooserController::OpenHelpCenterUrl() const {
       false /* is_renderer_initialized */));
 }
 
+void BluetoothChooserController::UpdateAdapterPresence(
+    content::BluetoothChooser::AdapterPresence presence) {
+  ClearAllDevices();
+  switch (presence) {
+    case content::BluetoothChooser::AdapterPresence::ABSENT:
+      break;
+    case content::BluetoothChooser::AdapterPresence::POWERED_OFF:
+      if (observer())
+        observer()->AdapterOff();
+      break;
+    case content::BluetoothChooser::AdapterPresence::POWERED_ON:
+      if (observer())
+        observer()->AdapterOn();
+      break;
+  }
+}
+
+void BluetoothChooserController::UpdateDiscoveryState(
+    content::BluetoothChooser::DiscoveryState state) {
+  switch (state) {
+    case content::BluetoothChooser::DiscoveryState::DISCOVERING:
+      if (observer())
+        observer()->Refresh();
+      break;
+    case content::BluetoothChooser::DiscoveryState::IDLE:
+    case content::BluetoothChooser::DiscoveryState::FAILED_TO_START:
+      if (observer())
+        observer()->Idle();
+      break;
+  }
+}
+
 void BluetoothChooserController::AddDevice(const std::string& device_id,
                                            const base::string16& device_name) {
   device_names_and_ids_.push_back(std::make_pair(device_name, device_id));
@@ -103,3 +148,8 @@ void BluetoothChooserController::RemoveDevice(const std::string& device_id) {
     }
   }
 }
+
+void BluetoothChooserController::ClearAllDevices() {
+  device_names_and_ids_.clear();
+  device_name_map_.clear();
+}