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

ui/gfx/ipc/gfx_param_traits_macros.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.
 
 // Singly or multiply-included shared traits file depending upon circumstances.
 // This allows the use of IPC serialization macros in more than one IPC message
 // file.
 #ifndef UI_GFX_IPC_GFX_PARAM_TRAITS_MACROS_H_
 #define UI_GFX_IPC_GFX_PARAM_TRAITS_MACROS_H_
 
 #include "ipc/ipc_message_macros.h"
 #include "ui/gfx/buffer_types.h"
 #include "ui/gfx/gpu_memory_buffer.h"
 #include "ui/gfx/ipc/gfx_ipc_export.h"
 #include "ui/gfx/selection_bound.h"
 #include "ui/gfx/swap_result.h"
 
-#if defined(USE_OZONE)
+#if defined(OS_LINUX)
 #include "ui/gfx/native_pixmap_handle.h"
 #endif
 
 #undef IPC_MESSAGE_EXPORT
 #define IPC_MESSAGE_EXPORT GFX_IPC_EXPORT
 
 IPC_ENUM_TRAITS_MAX_VALUE(gfx::BufferFormat, gfx::BufferFormat::LAST)
 
 IPC_ENUM_TRAITS_MAX_VALUE(gfx::BufferUsage, gfx::BufferUsage::LAST)
 
 IPC_ENUM_TRAITS_MAX_VALUE(gfx::GpuMemoryBufferType,
                           gfx::GPU_MEMORY_BUFFER_TYPE_LAST)
 
 IPC_ENUM_TRAITS_MAX_VALUE(gfx::SwapResult, gfx::SwapResult::SWAP_RESULT_LAST)
 
 IPC_ENUM_TRAITS_MAX_VALUE(gfx::SelectionBound::Type, gfx::SelectionBound::LAST);
 
 IPC_STRUCT_TRAITS_BEGIN(gfx::GpuMemoryBufferHandle)
   IPC_STRUCT_TRAITS_MEMBER(id)
   IPC_STRUCT_TRAITS_MEMBER(type)
   IPC_STRUCT_TRAITS_MEMBER(handle)
   IPC_STRUCT_TRAITS_MEMBER(offset)
   IPC_STRUCT_TRAITS_MEMBER(stride)
-#if defined(USE_OZONE)
+#if defined(OS_LINUX)
   IPC_STRUCT_TRAITS_MEMBER(native_pixmap_handle)
 #elif defined(OS_MACOSX)
   IPC_STRUCT_TRAITS_MEMBER(mach_port)
 #endif
 IPC_STRUCT_TRAITS_END()
 
 IPC_STRUCT_TRAITS_BEGIN(gfx::GpuMemoryBufferId)
   IPC_STRUCT_TRAITS_MEMBER(id)
 IPC_STRUCT_TRAITS_END()
 
-#if defined(USE_OZONE)
+#if defined(OS_LINUX)
 IPC_STRUCT_TRAITS_BEGIN(gfx::NativePixmapPlane)
   IPC_STRUCT_TRAITS_MEMBER(stride)
   IPC_STRUCT_TRAITS_MEMBER(offset)
   IPC_STRUCT_TRAITS_MEMBER(size)
   IPC_STRUCT_TRAITS_MEMBER(modifier)
 IPC_STRUCT_TRAITS_END()
 
 IPC_STRUCT_TRAITS_BEGIN(gfx::NativePixmapHandle)
   IPC_STRUCT_TRAITS_MEMBER(fds)
   IPC_STRUCT_TRAITS_MEMBER(planes)
 IPC_STRUCT_TRAITS_END()
 #endif
 
 #undef IPC_MESSAGE_EXPORT
 #define IPC_MESSAGE_EXPORT
 
 #endif  // UI_GFX_IPC_GFX_PARAM_TRAITS_MACROS_H_