Move enable_webrtc to a buildflag header.

content/common/gpu_host_messages.h

 // 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.
 
 // Multiply-included message file, hence no include guard here, but see below
 // for a much smaller-than-usual include guard section.
 
 #include "build/build_config.h"
 #include "content/common/content_export.h"
 #include "content/common/establish_channel_params.h"
 #include "gpu/command_buffer/common/sync_token.h"
 #include "gpu/command_buffer/service/gpu_preferences.h"
 #include "gpu/config/gpu_info.h"
 #include "gpu/ipc/common/gpu_command_buffer_traits.h"
 #include "gpu/ipc/common/gpu_param_traits.h"
 #include "gpu/ipc/common/memory_stats.h"
 #include "gpu/ipc/common/surface_handle.h"
 #include "ipc/ipc_channel_handle.h"
 #include "ipc/ipc_message_macros.h"
 #include "ipc/ipc_message_start.h"
+#include "media/media_features.h"
 #include "ui/events/ipc/latency_info_param_traits.h"
 #include "ui/gfx/gpu_memory_buffer.h"
 #include "ui/gfx/ipc/gfx_param_traits.h"
 #include "ui/gfx/ipc/skia/gfx_skia_param_traits.h"
 #include "url/gurl.h"
 #include "url/ipc/url_param_traits.h"
 
 #undef IPC_MESSAGE_EXPORT
 #define IPC_MESSAGE_EXPORT CONTENT_EXPORT
 
@@ skipping 31 matching lines @@
 IPC_STRUCT_TRAITS_END()
 
 IPC_STRUCT_TRAITS_BEGIN(gpu::GpuPreferences)
   IPC_STRUCT_TRAITS_MEMBER(single_process)
   IPC_STRUCT_TRAITS_MEMBER(in_process_gpu)
   IPC_STRUCT_TRAITS_MEMBER(ui_prioritize_in_gpu_process)
   IPC_STRUCT_TRAITS_MEMBER(disable_accelerated_video_decode)
 #if defined(OS_CHROMEOS)
   IPC_STRUCT_TRAITS_MEMBER(disable_vaapi_accelerated_video_encode)
 #endif
-#if defined(ENABLE_WEBRTC)
+#if BUILDFLAG(ENABLE_WEBRTC)
   IPC_STRUCT_TRAITS_MEMBER(disable_web_rtc_hw_encoding)
 #endif
 #if defined(OS_WIN)
   IPC_STRUCT_TRAITS_MEMBER(enable_accelerated_vpx_decode)
   IPC_STRUCT_TRAITS_MEMBER(enable_low_latency_dxva)
   IPC_STRUCT_TRAITS_MEMBER(enable_zero_copy_dxgi_video)
   IPC_STRUCT_TRAITS_MEMBER(enable_nv12_dxgi_video)
 #endif
   IPC_STRUCT_TRAITS_MEMBER(compile_shader_always_succeeds)
   IPC_STRUCT_TRAITS_MEMBER(disable_gl_error_limit)
@@ skipping 143 matching lines @@
 IPC_MESSAGE_CONTROL1(GpuHostMsg_DidDestroyOffscreenContext, GURL /* url */)
 
 // Message from GPU to add a GPU log message to the about:gpu page.
 IPC_MESSAGE_CONTROL3(GpuHostMsg_OnLogMessage,
                      int /*severity*/,
                      std::string /* header */,
                      std::string /* message */)
 
 // Sent by the GPU process to indicate that a fields trial has been activated.
 IPC_MESSAGE_CONTROL1(GpuHostMsg_FieldTrialActivated, std::string /* name */)