Implement BluetoothLowEnergyWrapperFake for Bluetooth test fixture

device/bluetooth/bluetooth_classic_win_fake.cc

Index: device/bluetooth/bluetooth_classic_win_fake.cc
diff --git a/device/bluetooth/bluetooth_classic_win_fake.cc b/device/bluetooth/bluetooth_classic_win_fake.cc
index 2b8bec05eb589081a0f37dde47fd65c66c799abb..20ccf751342ea67ee974e7bc1181804f19c54591 100644
--- a/device/bluetooth/bluetooth_classic_win_fake.cc
+++ b/device/bluetooth/bluetooth_classic_win_fake.cc
@@ -9,7 +9,8 @@
 namespace device {
 namespace win {
 
-BluetoothClassicWrapperFake::BluetoothClassicWrapperFake() {}
+BluetoothClassicWrapperFake::BluetoothClassicWrapperFake()
+    : last_error_(ERROR_SUCCESS) {}
 BluetoothClassicWrapperFake::~BluetoothClassicWrapperFake() {}
 
 HBLUETOOTH_RADIO_FIND BluetoothClassicWrapperFake::FindFirstRadio(
@@ -17,8 +18,10 @@ HBLUETOOTH_RADIO_FIND BluetoothClassicWrapperFake::FindFirstRadio(
     HANDLE* out_handle) {
   if (simulated_radios_.get() != nullptr) {
     *out_handle = (PVOID)simulated_radios_.get();
+    last_error_ = ERROR_SUCCESS;
     return *out_handle;
   }
+  last_error_ = ERROR_NO_MORE_ITEMS;
   return NULL;
 }
 
@@ -27,8 +30,11 @@ DWORD BluetoothClassicWrapperFake::GetRadioInfo(
     PBLUETOOTH_RADIO_INFO out_radio_info) {
   if (simulated_radios_.get() != nullptr) {
     *out_radio_info = simulated_radios_->radio_info;
+    last_error_ = ERROR_SUCCESS;
+    return last_error_;
   }
-  return ERROR_SUCCESS;
+  last_error_ = ERROR_INVALID_HANDLE;
+  return last_error_;
 }
 
 BOOL BluetoothClassicWrapperFake::FindRadioClose(HBLUETOOTH_RADIO_FIND handle) {
@@ -37,14 +43,17 @@ BOOL BluetoothClassicWrapperFake::FindRadioClose(HBLUETOOTH_RADIO_FIND handle) {
 
 BOOL BluetoothClassicWrapperFake::IsConnectable(HANDLE handle) {
   if (simulated_radios_.get() != nullptr) {
+    last_error_ = ERROR_SUCCESS;
     return simulated_radios_->is_connectable;
   }
-  return TRUE;
+  last_error_ = ERROR_INVALID_HANDLE;
+  return false;
 }
 
 HBLUETOOTH_DEVICE_FIND BluetoothClassicWrapperFake::FindFirstDevice(
     const BLUETOOTH_DEVICE_SEARCH_PARAMS* params,
     BLUETOOTH_DEVICE_INFO* out_device_info) {
+  last_error_ = ERROR_NO_MORE_ITEMS;
   return NULL;
 }
 
@@ -57,7 +66,6 @@ BOOL BluetoothClassicWrapperFake::FindNextDevice(
 
 BOOL BluetoothClassicWrapperFake::FindDeviceClose(
     HBLUETOOTH_DEVICE_FIND handle) {
-  NOTIMPLEMENTED();
   return TRUE;
 }
 
@@ -71,6 +79,10 @@ BOOL BluetoothClassicWrapperFake::EnableIncomingConnections(HANDLE handle,
   return TRUE;
 }
 
+DWORD BluetoothClassicWrapperFake::LastError() {
+  return last_error_;
+}
+
 BluetoothRadio* BluetoothClassicWrapperFake::SimulateARadio(
     base::string16 name,
     BLUETOOTH_ADDRESS address) {