Use OS_LINUX instead of USE_OZONE in ui/gfx/ when possible

ui/gfx/native_pixmap_handle.h

 // Copyright 2015 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 UI_GFX_NATIVE_PIXMAP_HANDLE_H_
 #define UI_GFX_NATIVE_PIXMAP_HANDLE_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <vector>
 
+#include "build/build_config.h"
 #include "ui/gfx/gfx_export.h"
 
-#if defined(USE_OZONE)
+#if defined(OS_LINUX)
 #include "base/file_descriptor_posix.h"
 #endif
 
 namespace gfx {
 
 // NativePixmapPlane is used to carry the plane related information for GBM
 // buffer. More fields can be added if they are plane specific.
 struct GFX_EXPORT NativePixmapPlane {
   NativePixmapPlane();
   NativePixmapPlane(int stride, int offset, uint64_t size, uint64_t modifier);
@@ skipping 12 matching lines @@
   // Chromium code. Also one per plane per entry.
   uint64_t modifier;
 };
 
 struct GFX_EXPORT NativePixmapHandle {
   NativePixmapHandle();
   NativePixmapHandle(const NativePixmapHandle& other);
 
   ~NativePixmapHandle();
 
-#if defined(USE_OZONE)
+#if defined(OS_LINUX)
   // File descriptors for the underlying memory objects (usually dmabufs).
   std::vector<base::FileDescriptor> fds;
 #endif
   std::vector<NativePixmapPlane> planes;
 };
 
-#if defined(USE_OZONE)
+#if defined(OS_LINUX)
 // Returns an instance of |handle| which can be sent over IPC. This duplicates
 // the file-handles, so that the IPC code take ownership of them, without
 // invalidating |handle|.
 NativePixmapHandle CloneHandleForIPC(const NativePixmapHandle& handle);
 #endif
 
 }  // namespace gfx
 
 #endif  // UI_GFX_NATIVE_PIXMAP_HANDLE_H_