Fix GDI leak in NativeThemeWin::PaintIndirect

skia/ext/skia_utils_win.h

 // Copyright (c) 2006-2008 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.
 
 #ifndef SKIA_EXT_SKIA_UTILS_WIN_H_
 #define SKIA_EXT_SKIA_UTILS_WIN_H_
 
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "third_party/skia/include/core/SkMatrix.h"
@@ skipping 53 matching lines @@
                     const RECT& src_rect, const SkMatrix& transform);
 
 // Creates a surface writing to the pixels backing |context|'s bitmap.
 // Returns null on error.
 SK_API sk_sp<SkSurface> MapPlatformSurface(HDC context);
 
 // Creates a bitmap backed by the same pixels backing the HDC's bitmap.
 // Returns an empty bitmap on error.
 SK_API SkBitmap MapPlatformBitmap(HDC context);
 
-// Creates an offscreen HDC suitable for writing to via MapPlatformSurface().
-// Caller is responsible for calling DeleteDC() when done.
-// Will return null if any errors are encountered.
-// TODO(fmalita): consider returning ScopedCreateDC() when that type is
-// returnable (https://crbug.com/622442)
-SK_API HDC CreateOffscreenSurface(int width, int height);
-
 // Fills in a BITMAPINFOHEADER structure given the bitmap's size.
 SK_API void CreateBitmapHeader(int width, int height, BITMAPINFOHEADER* hdr);
 
 SK_API HBITMAP CreateHBitmap(int width, int height, bool is_opaque,
                              HANDLE shared_section = nullptr,
                              void** data = nullptr);
 
 }  // namespace skia
 
 #endif  // SKIA_EXT_SKIA_UTILS_WIN_H_