arc: bluetooth: Implement Gatt server request to read/write

components/arc/bluetooth/arc_bluetooth_bridge.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_ARC_BLUETOOTH_ARC_BLUETOOTH_BRIDGE_H_
 #define COMPONENTS_ARC_BLUETOOTH_ARC_BLUETOOTH_BRIDGE_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 100 matching lines @@
       device::BluetoothAdapter* adapter,
       device::BluetoothRemoteGattCharacteristic* characteristic,
       const std::vector<uint8_t>& value) override;
 
   void GattDescriptorValueChanged(
       device::BluetoothAdapter* adapter,
       device::BluetoothRemoteGattDescriptor* descriptor,
       const std::vector<uint8_t>& value) override;
 
   // Overridden from device::BluetoothLocalGattService::Delegate
+  template <class T>
+  void OnGattAttributeReadRequest(const device::BluetoothDevice* device,
+                                  const T* gatt_obj,
+                                  int offset,
+                                  const ValueCallback& callback,
+                                  const ErrorCallback& error_callback);
+
+  template <class T>
+  void OnGattAttributeWriteRequest(
+      const device::BluetoothDevice* device,
+      const T* gatt_obj,
+      const std::vector<uint8_t>& value,
+      int offset,
+      const base::Closure& callback,
+      const ErrorCallback& error_callback) override;
+
   void OnCharacteristicReadRequest(
       const device::BluetoothDevice* device,
       const device::BluetoothLocalGattCharacteristic* characteristic,
       int offset,
       const ValueCallback& callback,
       const ErrorCallback& error_callback) override;
 
   void OnCharacteristicWriteRequest(
       const device::BluetoothDevice* device,
       const device::BluetoothLocalGattCharacteristic* characteristic,
@@ skipping 215 matching lines @@
       mojom::BluetoothAddressPtr remote_addr,
       mojom::BluetoothGattServiceIDPtr service_id,
       mojom::BluetoothGattIDPtr char_id,
       mojom::BluetoothGattIDPtr desc_id) const;
 
   // Propagates the list of paired device to Android.
   void SendCachedPairedDevices() const;
 
   template <class T>
   int32_t CreateGattAttributeHandle(T* gatt_obj);
+  int32_t CreateGattReadTransaction(const ValueCallback& successCallback,
+                                    const ErrorCallback& errorCallback);
+  int32_t CreateGattWriteTransaction(const base::Closure& successCallback,
+                                     const ErrorCallback& errorCallback);
 
   mojo::Binding<mojom::BluetoothHost> binding_;
 
   scoped_refptr<bluez::BluetoothAdapterBlueZ> bluetooth_adapter_;
   scoped_refptr<device::BluetoothAdvertisement> advertisment_;
   std::unique_ptr<device::BluetoothDiscoverySession> discovery_session_;
   std::map<std::string, std::unique_ptr<device::BluetoothGattNotifySession>>
       notification_session_;
   // Map from android int handle to Chrome (BlueZ) string identifier.
   std::map<int32_t, std::string> gatt_identifier_;
+  std::map<int32_t, std::pair<ValueCallback, ErrorCallback>>

[rkc, 2016/07/01 22:51:32]

Can we have this aliased with using? It would also help understand what each of
the fields are.

[puthik_chromium, 2016/07/14 22:45:12]

Done.

+      gatt_read_callbacks_;
+  std::map<int32_t, std::pair<base::Closure, ErrorCallback>>
+      gatt_write_callbacks_;
 
   // WeakPtrFactory to use for callbacks.
   base::WeakPtrFactory<ArcBluetoothBridge> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ArcBluetoothBridge);
 };
 
 }  // namespace arc
 
 #endif  // COMPONENTS_ARC_BLUETOOTH_ARC_BLUETOOTH_BRIDGE_H_