Add bluetooth callbacks for fetching paired devices and stopping device discovery.

chrome/browser/ui/webui/options2/chromeos/bluetooth_options_handler2.h

Index: chrome/browser/ui/webui/options2/chromeos/bluetooth_options_handler2.h
diff --git a/chrome/browser/ui/webui/options2/chromeos/bluetooth_options_handler2.h b/chrome/browser/ui/webui/options2/chromeos/bluetooth_options_handler2.h
index f519797bb4ef46fe62c396a29cfbf92a4280a04d..b1dbf430b3d03e2d1161ec3a438ba46c9dab5566 100644
--- a/chrome/browser/ui/webui/options2/chromeos/bluetooth_options_handler2.h
+++ b/chrome/browser/ui/webui/options2/chromeos/bluetooth_options_handler2.h
@@ -61,6 +61,16 @@ class BluetoothOptionsHandler : public ::options2::OptionsPageUIHandler,
   // argument is present, it is the passkey for pairing confirmation.
   void UpdateDeviceCallback(const base::ListValue* args);
 
+  // Called when the "Add a device" dialog closes to stop the discovery
+  // process.
+  // |args| will be an empty list.
+  void StopDiscoveryCallback(const base::ListValue* args);
+
+  // Called when the list of paired devices is initialized in order to
+  // populate the list.
+  // |args| will be an empty list.
+  void GetPairedDevicesCallback(const base::ListValue* args);
+
   // Sends a notification to the Web UI of the status of a Bluetooth device.
   // |device| is the Bluetooth device.
   // |params| is an optional set of parameters.