Remove implicit HANDLE conversions from chrome.

chrome/utility/image_writer/image_writer_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 <windows.h>
 #include <setupapi.h>
 #include <winioctl.h>
 
 #include "chrome/utility/image_writer/error_messages.h"
 #include "chrome/utility/image_writer/image_writer.h"
 
 namespace image_writer {
 
 const size_t kStorageQueryBufferSize = 1024;
 
 bool ImageWriter::IsValidDevice() {
   base::win::ScopedHandle device_handle(
       CreateFile(device_path_.value().c_str(),
                  GENERIC_READ | GENERIC_WRITE,
                  FILE_SHARE_READ | FILE_SHARE_WRITE,
                  NULL,
                  OPEN_EXISTING,
                  FILE_FLAG_NO_BUFFERING | FILE_FLAG_WRITE_THROUGH,
                  NULL));
-  if (device_handle == INVALID_HANDLE_VALUE) {
+  if (!device_handle.IsValid()) {
     Error(error::kOpenDevice);
     return false;
   }
 
   STORAGE_PROPERTY_QUERY query = STORAGE_PROPERTY_QUERY();
   query.PropertyId = StorageDeviceProperty;
   query.QueryType = PropertyStandardQuery;
   DWORD bytes_returned;
 
   scoped_ptr<char[]> output_buf(new char[kStorageQueryBufferSize]);
   BOOL status = DeviceIoControl(
-      device_handle,                   // Device handle.
+      device_handle.Get(),             // Device handle.
       IOCTL_STORAGE_QUERY_PROPERTY,    // Flag to request device properties.
       &query,                          // Query parameters.
       sizeof(STORAGE_PROPERTY_QUERY),  // query parameters size.
       output_buf.get(),                // output buffer.
       kStorageQueryBufferSize,         // Size of buffer.
       &bytes_returned,                 // Number of bytes returned.
                                        // Must not be null.
       NULL);                           // Optional unused overlapped perameter.
 
   if (!status) {
@@ skipping 142 matching lines @@
 
   if (volume_finder != INVALID_HANDLE_VALUE) {
     FindVolumeClose(volume_finder);
   }
 
   if (success)
     continuation.Run();
 }
 
 }  // namespace image_writer