Improve processing of Bluetooth device discovery on Windows.

device/bluetooth/bluetooth_low_energy_win.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_low_energy_win.h"
 
 #include "base/files/file.h"
 #include "base/logging.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/win/scoped_handle.h"
@@ skipping 634 matching lines @@
         return true;
       case kError:
         return false;
       case kOk:
         devices->push_back(device_info.release());
     }
   }
 }
 
 bool EnumerateKnownBluetoothLowEnergyServices(
-    BluetoothLowEnergyDeviceInfo* device_info,
+    const base::FilePath& device_path,
     ScopedVector<BluetoothLowEnergyServiceInfo>* services,
     std::string* error) {
-  return CollectBluetoothLowEnergyDeviceServices(
-      device_info->path, services, error);
+  if (!IsBluetoothLowEnergySupported()) {
+    *error = kPlatformNotSupported;
+    return false;
+  }
+
+  return CollectBluetoothLowEnergyDeviceServices(device_path, services, error);
 }
 
 bool ExtractBluetoothAddressFromDeviceInstanceIdForTesting(
     const std::string& instance_id,
     BLUETOOTH_ADDRESS* btha,
     std::string* error) {
   return ExtractBluetoothAddressFromDeviceInstanceId(instance_id, btha, error);
 }
 
 }  // namespace win
 }  // namespace device