bluetooth: Refactor device/bluetooth for C++ Style: typedef ordering.

device/bluetooth/bluetooth_gatt_descriptor.h

Index: device/bluetooth/bluetooth_gatt_descriptor.h
diff --git a/device/bluetooth/bluetooth_gatt_descriptor.h b/device/bluetooth/bluetooth_gatt_descriptor.h
index 442a6aeb2c8a4b5100ca153182402151eee38fd4..c91de1cc3775f4e7134316e818ad0d70eb231829 100644
--- a/device/bluetooth/bluetooth_gatt_descriptor.h
+++ b/device/bluetooth/bluetooth_gatt_descriptor.h
@@ -21,6 +21,14 @@ namespace device {
 // characteristic's features or to control certain behaviors.
 class DEVICE_BLUETOOTH_EXPORT BluetoothGattDescriptor {
  public:
+  // The ErrorCallback is used by methods to asynchronously report errors.
+  typedef base::Callback<void(BluetoothGattService::GattErrorCode)>
+      ErrorCallback;
+
+  // The ValueCallback is used to return the value of a remote characteristic
+  // descriptor upon a read request.
+  typedef base::Callback<void(const std::vector<uint8>&)> ValueCallback;
+
   // The Bluetooth Specification declares several predefined descriptors that
   // profiles can use. The following are definitions for the list of UUIDs
   // and descriptions of the characteristic descriptors that they represent.
@@ -106,14 +114,6 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothGattDescriptor {
   // handled by the subsystem.
   static const BluetoothUUID& CharacteristicAggregateFormatUuid();
 
-  // The ErrorCallback is used by methods to asynchronously report errors.
-  typedef base::Callback<void(BluetoothGattService::GattErrorCode)>
-      ErrorCallback;
-
-  // The ValueCallback is used to return the value of a remote characteristic
-  // descriptor upon a read request.
-  typedef base::Callback<void(const std::vector<uint8>&)> ValueCallback;
-
   // Constructs a BluetoothGattDescriptor that can be associated with a local
   // GATT characteristic when the adapter is in the peripheral role. To
   // associate the returned descriptor with a characteristic, add it to a local