Notify the BluetoothAdapter::Observer when a bluetooth peripheral disconnects on Android and Mac.

device/bluetooth/bluetooth_device_unittest.cc

 // Copyright 2014 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.
 
 #include "device/bluetooth/bluetooth_device.h"
 
 #include <stddef.h>
 
 #include "base/macros.h"
 #include "base/run_loop.h"
@@ skipping 140 matching lines @@
   device->CreateGattConnection(GetGattConnectionCallback(Call::EXPECTED),
                                GetConnectErrorCallback(Call::NOT_EXPECTED));
   SimulateGattConnection(device);
   ASSERT_EQ(1u, gatt_connections_.size());
   EXPECT_TRUE(device->IsGattConnected());
   EXPECT_TRUE(gatt_connections_[0]->IsConnected());
 }
 #endif  // defined(OS_ANDROID) || defined(OS_MACOSX)
 
 #if defined(OS_ANDROID) || defined(OS_MACOSX)
+TEST_F(BluetoothTest, DisconnectionNotifiesDeviceChanged) {
+  if (!PlatformSupportsLowEnergy()) {
+    LOG(WARNING) << "Low Energy Bluetooth unavailable, skipping unit test.";
+    return;
+  }
+  InitWithFakeAdapter();
+  TestBluetoothAdapterObserver observer(adapter_);
+  StartLowEnergyDiscoverySession();
+  BluetoothDevice* device = SimulateLowEnergyDevice(3);
+  device->CreateGattConnection(GetGattConnectionCallback(Call::EXPECTED),
+                               GetConnectErrorCallback(Call::NOT_EXPECTED));
+  SimulateGattConnection(device);
+  EXPECT_EQ(1, observer.device_changed_count());
+  EXPECT_TRUE(device->IsConnected());
+  EXPECT_TRUE(device->IsGattConnected());
+
+  SimulateGattDisconnection(device);
+  EXPECT_EQ(2, observer.device_changed_count());
+  EXPECT_FALSE(device->IsConnected());
+  EXPECT_FALSE(device->IsGattConnected());
+}
+#endif  // defined(OS_ANDROID) || defined(OS_MACOSX)
+
+#if defined(OS_ANDROID) || defined(OS_MACOSX)
 // Creates BluetoothGattConnection instances and tests that the interface
 // functions even when some Disconnect and the BluetoothDevice is destroyed.
 TEST_F(BluetoothTest, BluetoothGattConnection) {
   if (!PlatformSupportsLowEnergy()) {
     LOG(WARNING) << "Low Energy Bluetooth unavailable, skipping unit test.";
     return;
   }
   InitWithFakeAdapter();
   StartLowEnergyDiscoverySession();
   BluetoothDevice* device = SimulateLowEnergyDevice(3);
@@ skipping 440 matching lines @@
   ResetEventCounts();
   SimulateGattConnection(device);
   EXPECT_EQ(1, gatt_discovery_attempts_);
 
   SimulateGattServicesDiscoveryError(device);
   EXPECT_EQ(0u, device->GetGattServices().size());
 }
 #endif  // defined(OS_ANDROID) || defined(OS_MACOSX)
 
 }  // namespace device