Add Device Policy Handler for Bluetooth, and allow disabling the Bluetooth adapter on Chrome OS

device/bluetooth/bluetooth_adapter_bluez.h

Index: device/bluetooth/bluetooth_adapter_bluez.h
diff --git a/device/bluetooth/bluetooth_adapter_bluez.h b/device/bluetooth/bluetooth_adapter_bluez.h
index 3d402d4fd1afac5b8da441256531c03e80f63e8d..deba2df891f59b75559cbe26f969330e85363e4c 100644
--- a/device/bluetooth/bluetooth_adapter_bluez.h
+++ b/device/bluetooth/bluetooth_adapter_bluez.h
@@ -86,6 +86,7 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothAdapterBlueZ
                const ErrorCallback& error_callback) override;
   bool IsInitialized() const override;
   bool IsPresent() const override;
+  void SetDisabled(bool disabled) override;
   bool IsPowered() const override;
   void SetPowered(bool powered,
                   const base::Closure& callback,
@@ -346,6 +347,10 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothAdapterBlueZ
   // Set in |Shutdown()|, makes IsPresent()| return false.
   bool dbus_is_shutdown_;
 
+  // Set in |SetDisabled()|, makes |IsPresent()| return false
+  // (just disables the interface, doesn't actually shut it down).
+  bool is_disabled_;
+
   // Number of discovery sessions that have been added.
   int num_discovery_sessions_;