ui: Fix faulty drm/gbm DCHECKs.

ui/gl/gl_image_ozone_native_pixmap_drm_unittest.cc

 // Copyright 2016 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 <fcntl.h>
 #include <libdrm/i915_drm.h>
 #include <linux/types.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <sys/mman.h>
@@ skipping 25 matching lines @@
 scoped_refptr<ui::NativePixmap> CreateYVU420Pixmap(const gfx::Size& size,
                                                    const uint8_t color[4]) {
   DCHECK_EQ(0, size.width() % 2);
   DCHECK_EQ(0, size.height() % 2);
 
   // TODO(dcastagna): move the creation of the drmbuf to minigmb, where it's
   // supposed to be, so we can abastract it and use SurfaceFactoryOzone.
   base::ScopedFD drm_fd(
       HANDLE_EINTR(open("/dev/dri/card0", O_RDWR | O_CLOEXEC)));
   DCHECK(drm_fd.is_valid()) << "Couldn't open '/dev/dri/card0'";
-  {  // Check we have permissions
-    drm_magic_t magic{};
-    bool ret = !drmGetMagic(drm_fd.get(), &magic) &&
-               !drmAuthMagic(drm_fd.get(), magic);
-    DCHECK(ret);
-  }
 
   std::vector<int> pitches{RoundTo64(size.width()), RoundTo64(size.width() / 2),
                            RoundTo64(size.width() / 2)};
   std::vector<int> offsets{
       0, pitches[0] * size.height() + pitches[1] * size.height() / 2,
       pitches[0] * size.height(),
   };
   size_t byte_number = pitches[0] * size.height() +
                        pitches[1] * size.height() / 2 +
                        pitches[2] * size.height() / 2;
@@ skipping 74 matching lines @@
 INSTANTIATE_TYPED_TEST_CASE_P(DISABLED_GLImageOzoneNativePixmapDrm,
                               GLImageTest,
                               GLImageOzoneNativePixmapDrmTestDelegate);
 
 INSTANTIATE_TYPED_TEST_CASE_P(DISABLED_GLImageOzoneNativePixmapDrm,
                               GLImageBindTest,
                               GLImageOzoneNativePixmapDrmTestDelegate);
 
 }  // namespace
 }  // namespace gl