bluetooth: mac: add connected LE devices to chooser

device/bluetooth/bluetooth_adapter.h

Index: device/bluetooth/bluetooth_adapter.h
diff --git a/device/bluetooth/bluetooth_adapter.h b/device/bluetooth/bluetooth_adapter.h
index ea2b48c8efeb12053356766e9bcfe88f0d3a201f..6d3efa8a962af80d76ec363191dd8940ebeb80bb 100644
--- a/device/bluetooth/bluetooth_adapter.h
+++ b/device/bluetooth/bluetooth_adapter.h
@@ -11,6 +11,7 @@
 #include <memory>
 #include <set>
 #include <string>
+#include <unordered_map>
 #include <utility>
 #include <vector>
 
@@ -317,6 +318,13 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothAdapter
   // Indicates whether the adapter is currently discovering new devices.
   virtual bool IsDiscovering() const = 0;
 
+  // This function get all the connected peripherals into |devices_|.

[scheib, 2016/10/28 20:35:50]

Let's fix up comments some. First, GetDevices() is currently documented as
returning all connected and paired devices. We need to explain on that method
why that may not be true and that this method is needed.

This method should then explain that it returns connected devices and makes them
known to GetDevices. e.g. here something like:

Returns currently connected peripherals and adds them to known devices returned
by GetDevices().

[jlebel, 2016/11/07 01:43:17]

Done.

+  // TODO(crbug.com/653032): Needs to be implemented for Android, ChromeOS and
+  // Windows.
+  virtual std::unordered_map<BluetoothDevice*, BluetoothDevice::UUIDSet>
+  RetrieveGattConnectedDevicesWithDiscoveryFilter(
+      const BluetoothDiscoveryFilter* discovery_filter);
+
   // Requests the adapter to start a new discovery session. On success, a new
   // instance of BluetoothDiscoverySession will be returned to the caller via
   // |callback| and the adapter will be discovering nearby Bluetooth devices.