Fix "unused variable" warnings.

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 <memory>
 #include <utility>
 
 #include "base/files/file.h"
@@ skipping 577 matching lines @@
       CHECK_GE(character_size, 1u);
       WCHAR* value_string = reinterpret_cast<WCHAR*>(value.get());
       value_string[character_size - 1] = 0;
       break;
     }
     case REG_DWORD: {
       CHECK_EQ(value_size, sizeof(DWORD));
       break;
     }
   }
-  return base::WrapUnique(new DeviceRegistryPropertyValue(
-      property_type, std::move(value), value_size));
+  return base::WrapUnique(
+      new DeviceRegistryPropertyValue(property_type, std::move(value)));
 }
 
 DeviceRegistryPropertyValue::DeviceRegistryPropertyValue(
     DWORD property_type,
-    std::unique_ptr<uint8_t[]> value,
-    size_t value_size)
-    : property_type_(property_type),
-      value_(std::move(value)),
-      value_size_(value_size) {}
+    std::unique_ptr<uint8_t[]> value)
+    : property_type_(property_type), value_(std::move(value)) {}
 
 DeviceRegistryPropertyValue::~DeviceRegistryPropertyValue() {
 }
 
 std::string DeviceRegistryPropertyValue::AsString() const {
   CHECK_EQ(property_type_, static_cast<DWORD>(REG_SZ));
   WCHAR* value_string = reinterpret_cast<WCHAR*>(value_.get());
   return base::SysWideToUTF8(value_string);
 }
 
@@ skipping 247 matching lines @@
   base::File file(service_path, base::File::FLAG_OPEN | base::File::FLAG_READ |
                                     base::File::FLAG_WRITE);
   if (!file.IsValid())
     return HRESULT_FROM_WIN32(ERROR_OPEN_FAILED);
   return BluetoothGATTSetDescriptorValue(file.GetPlatformFile(), descriptor,
                                          new_value, BLUETOOTH_GATT_FLAG_NONE);
 }
 
 }  // namespace win
 }  // namespace device