Bluetooth: treat unpairable devices as Trusted/Paired

device/bluetooth/bluetooth_device_experimental_chromeos.cc

Index: device/bluetooth/bluetooth_device_experimental_chromeos.cc
diff --git a/device/bluetooth/bluetooth_device_experimental_chromeos.cc b/device/bluetooth/bluetooth_device_experimental_chromeos.cc
index fb36c8450c43312e928c254f5a19fdd1135a32ea..33767756aae3e6612830b3b039132c041a26c228 100644
--- a/device/bluetooth/bluetooth_device_experimental_chromeos.cc
+++ b/device/bluetooth/bluetooth_device_experimental_chromeos.cc
@@ -74,7 +74,10 @@ bool BluetoothDeviceExperimentalChromeOS::IsPaired() const {
           GetProperties(object_path_);
   DCHECK(properties);
 
-  return properties->paired.value();
+  // Trusted devices are devices that don't support pairing but that the
+  // user has explicitly connected; it makes no sense for UI purposes to
+  // treat them differently from each other.
+  return properties->paired.value() || properties->trusted.value();
 }
 
 bool BluetoothDeviceExperimentalChromeOS::IsConnected() const {
@@ -139,8 +142,8 @@ void BluetoothDeviceExperimentalChromeOS::Connect(
   VLOG(1) << object_path_.value() << ": Connecting, " << num_connecting_calls_
           << " in progress";
 
-  if (IsPaired() || IsConnected() || !pairing_delegate) {
-    // No need to pair, skip straight to connection.
+  if (IsPaired() || IsConnected() || !pairing_delegate || !IsPairable()) {
+    // No need to pair, or unable to, skip straight to connection.
     ConnectInternal(callback, error_callback);
   } else {
     // Initiate high-security connection with pairing.
@@ -396,6 +399,8 @@ void BluetoothDeviceExperimentalChromeOS::OnConnect(
   VLOG(1) << object_path_.value() << ": Connected, " << num_connecting_calls_
         << " still in progress";
 
+  SetTrusted();
+
   callback.Run();
 }
 
@@ -465,21 +470,8 @@ void BluetoothDeviceExperimentalChromeOS::OnPair(
     const base::Closure& callback,
     const ConnectErrorCallback& error_callback) {
   VLOG(1) << object_path_.value() << ": Paired";
-
-  // Now that we're paired, we need to set the device as trusted so that
-  // incoming connections will be accepted. This should only ever fail if
-  // the device is removed mid-pairing, so do it in the background while
-  // we connect and don't worry about errors.
-  DBusThreadManager::Get()->GetExperimentalBluetoothDeviceClient()->
-      GetProperties(object_path_)->trusted.Set(
-          true,
-          base::Bind(
-              &BluetoothDeviceExperimentalChromeOS::OnSetTrusted,
-              weak_ptr_factory_.GetWeakPtr()));
-
   UnregisterAgent();
-
-  // Now we can connect to the device!
+  SetTrusted();
   ConnectInternal(callback, error_callback);
 }
 
@@ -520,6 +512,19 @@ void BluetoothDeviceExperimentalChromeOS::OnCancelPairingError(
                << error_name << ": " << error_message;
 }
 
+void BluetoothDeviceExperimentalChromeOS::SetTrusted() {
+  // Unconditionally send the property change, rather than checking the value
+  // first; there's no harm in doing this and it solves any race conditions
+  // with the property becoming true or false and this call happening before
+  // we get the D-Bus signal about the earlier change.
+  DBusThreadManager::Get()->GetExperimentalBluetoothDeviceClient()->
+      GetProperties(object_path_)->trusted.Set(
+          true,
+          base::Bind(
+              &BluetoothDeviceExperimentalChromeOS::OnSetTrusted,
+              weak_ptr_factory_.GetWeakPtr()));
+}
+
 void BluetoothDeviceExperimentalChromeOS::OnSetTrusted(bool success) {
   LOG_IF(WARNING, !success) << object_path_.value()
                             << ": Failed to set device as trusted";