device/bluetooth: Add chromeos::BluetoothRemoteGattDescriptorChromeOS.

Added the chromeos::BluetoothRemoteGattDescriptorChromeOS class which implements
a remote instance of device::BluetoothGattDescriptor for the Chrome OS platform.

BUG=360266,340529
TEST=device_unittests

Review URL: https://codereview.chromium.org/234443005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@263194 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 19 insertions, 1 deletions

diff --git a/chromeos/dbus/fake_bluetooth_gatt_characteristic_client.cc b/chromeos/dbus/fake_bluetooth_gatt_characteristic_client.cc
index 55784a9..dbbdcc3 100644
--- a/chromeos/dbus/fake_bluetooth_gatt_characteristic_client.cc
+++ b/chromeos/dbus/fake_bluetooth_gatt_characteristic_client.cc
@@ -8,6 +8,8 @@
 #include "base/message_loop/message_loop.h"
 #include "base/rand_util.h"
 #include "base/time/time.h"
+#include "chromeos/dbus/dbus_thread_manager.h"
+#include "chromeos/dbus/fake_bluetooth_gatt_descriptor_client.h"
 #include "third_party/cros_system_api/dbus/service_constants.h"
 
 namespace chromeos {
@@ -207,12 +209,28 @@ void FakeBluetoothGattCharacteristicClient::ExposeHeartRateCharacteristics(
   // be handled by BlueZ, automatically set up notifications for now.
   ScheduleHeartRateMeasurementValueChange();
 
-  // TODO(armansito): Add descriptors.
+  // Expose CCC descriptor for Heart Rate Measurement characteristic.
+  FakeBluetoothGattDescriptorClient* descriptor_client =
+      static_cast<FakeBluetoothGattDescriptorClient*>(
+          DBusThreadManager::Get()->GetBluetoothGattDescriptorClient());
+  dbus::ObjectPath ccc_path(descriptor_client->ExposeDescriptor(
+      dbus::ObjectPath(heart_rate_measurement_path_),
+      FakeBluetoothGattDescriptorClient::
+          kClientCharacteristicConfigurationUUID));
+  DCHECK(ccc_path.IsValid());
+  heart_rate_measurement_ccc_desc_path_ = ccc_path.value();
 }
 
 void FakeBluetoothGattCharacteristicClient::HideHeartRateCharacteristics() {
   VLOG(2) << "Hiding fake Heart Rate characteristics.";
 
+  // Hide the descriptors.
+  FakeBluetoothGattDescriptorClient* descriptor_client =
+      static_cast<FakeBluetoothGattDescriptorClient*>(
+          DBusThreadManager::Get()->GetBluetoothGattDescriptorClient());
+  descriptor_client->HideDescriptor(
+      dbus::ObjectPath(heart_rate_measurement_ccc_desc_path_));
+
   // Notify the observers before deleting the properties structures so that they
   // can be accessed from the observer method.
   NotifyCharacteristicRemoved(dbus::ObjectPath(heart_rate_measurement_path_));