Fix crash in NativeThemeWin::PaintIndirect when HDC allocation fails

BUG=339117

Review URL: https://codereview.chromium.org/137383007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247856 0039d316-1c4b-4281-b951-d872f2087c98

ui/native_theme/native_theme_win.cc

@@ -615,6 +615,8 @@ void NativeThemeWin::PaintIndirect(SkCanvas* canvas,
       skia::BitmapPlatformDevice::Create(
           rect.width(), rect.height(), false, NULL));
   DCHECK(device);
+  if (!device)
+    return;
   SkCanvas offscreen_canvas(device.get());
   DCHECK(skia::SupportsPlatformPaint(&offscreen_canvas));