bluetooth: Implement RSSI indicator on android

content/browser/bluetooth/bluetooth_device_chooser_controller.cc

Index: content/browser/bluetooth/bluetooth_device_chooser_controller.cc
diff --git a/content/browser/bluetooth/bluetooth_device_chooser_controller.cc b/content/browser/bluetooth/bluetooth_device_chooser_controller.cc
index d524f19a864af9ab0535804a44eb4ad78e27bf78..9f5882c1f01985d7d870506ad1d3d2368b653480 100644
--- a/content/browser/bluetooth/bluetooth_device_chooser_controller.cc
+++ b/content/browser/bluetooth/bluetooth_device_chooser_controller.cc
@@ -214,6 +214,7 @@ BluetoothDeviceChooserController::BluetoothDeviceChooserController(
                      // destructor starts.
                      base::Unretained(this)),
           /*is_repeating=*/false),
+      should_update_chooser_(false),
       weak_ptr_factory_(this) {
   CHECK(adapter_);
 }
@@ -331,6 +332,7 @@ void BluetoothDeviceChooserController::GetDevice(
     return;
   }
 
+  should_update_chooser_ = true;
   PopulateConnectedDevices();
   if (!chooser_.get()) {
     // If the dialog's closing, no need to do any of the rest of this.
@@ -348,7 +350,8 @@ void BluetoothDeviceChooserController::GetDevice(
 
 void BluetoothDeviceChooserController::AddFilteredDevice(
     const device::BluetoothDevice& device) {
-  if (chooser_.get() && MatchesFilters(device, options_->filters)) {
+  if (should_update_chooser_ && chooser_.get() &&
+      MatchesFilters(device, options_->filters)) {
     base::Optional<int8_t> rssi = device.GetInquiryRSSI();
     chooser_->AddOrUpdateDevice(
         device.GetAddress(), !!device.GetName() /* should_update_name */,
@@ -426,6 +429,7 @@ void BluetoothDeviceChooserController::StartDeviceDiscovery() {
 
 void BluetoothDeviceChooserController::StopDeviceDiscovery() {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  should_update_chooser_ = false;
   StopDiscoverySession(std::move(discovery_session_));
   if (chooser_) {
     chooser_->ShowDiscoveryState(BluetoothChooser::DiscoveryState::IDLE);
@@ -460,6 +464,7 @@ void BluetoothDeviceChooserController::OnBluetoothChooserEvent(
 
   switch (event) {
     case BluetoothChooser::Event::RESCAN:
+      should_update_chooser_ = true;
       PopulateConnectedDevices();
       DCHECK(chooser_);
       StartDeviceDiscovery();