arc: bluetooth: Implement Gatt notify

components/arc/bluetooth/arc_bluetooth_bridge.cc

Index: components/arc/bluetooth/arc_bluetooth_bridge.cc
diff --git a/components/arc/bluetooth/arc_bluetooth_bridge.cc b/components/arc/bluetooth/arc_bluetooth_bridge.cc
index 45228c0379ccf23323cfdf50c117b724f27ca508..5d2d9a8eb3bc24568fa0fd6088dbf3b51b551c6b 100644
--- a/components/arc/bluetooth/arc_bluetooth_bridge.cc
+++ b/components/arc/bluetooth/arc_bluetooth_bridge.cc
@@ -46,6 +46,7 @@ using device::BluetoothUUID;
 
 namespace {
 const int kMinBtleVersion = 1;
+const int kMinBtleNotifyVersion = 2;

[ortuno, 2016/06/21 23:23:06]

enum { kMinBtleNotifyVersion = 2 };

Context:
https://groups.google.com/a/chromium.org/forum/#!msg/chromium-dev/hDqJ4KBVqog/

[puthik_chromium, 2016/06/23 02:53:34]

Done.

 const uint32_t kGattReadPermission =
     BluetoothGattCharacteristic::Permission::PERMISSION_READ |
     BluetoothGattCharacteristic::Permission::PERMISSION_READ_ENCRYPTED |
@@ -257,7 +258,31 @@ void ArcBluetoothBridge::GattCharacteristicValueChanged(
     BluetoothAdapter* adapter,
     BluetoothRemoteGattCharacteristic* characteristic,
     const std::vector<uint8_t>& value) {
-  // Placeholder for GATT client functionality
+  if (!HasBluetoothInstance())
+    return;
+
+  if (arc_bridge_service()->bluetooth_version() < kMinBtleNotifyVersion) {
+    LOG(WARNING) << "Bluetooth instance is too old and does not support notify";
+    return;
+  }
+  BluetoothRemoteGattService* service = characteristic->GetService();
+  BluetoothDevice* device = service->GetDevice();
+  mojom::BluetoothAddressPtr address =
+      mojom::BluetoothAddress::From(device->GetAddress());
+  mojom::BluetoothGattServiceIDPtr service_id =
+      mojom::BluetoothGattServiceID::New();
+  service_id->is_primary = service->IsPrimary();
+  service_id->id = mojom::BluetoothGattID::New();
+  service_id->id->inst_id = ConvertGattIdentifierToId(service->GetIdentifier());
+  service_id->id->uuid = mojom::BluetoothUUID::From(service->GetUUID());
+
+  mojom::BluetoothGattIDPtr char_id = mojom::BluetoothGattID::New();
+  char_id->inst_id = ConvertGattIdentifierToId(characteristic->GetIdentifier());
+  char_id->uuid = mojom::BluetoothUUID::From(characteristic->GetUUID());
+
+  arc_bridge_service()->bluetooth_instance()->OnGattNotify(
+      std::move(address), std::move(service_id), std::move(char_id),
+      true /* is_notify */, mojo::Array<uint8_t>::From(value));
 }
 
 void ArcBluetoothBridge::GattDescriptorValueChanged(