content gpu refactor: get rid of gpu related content switches.

content/common/gpu/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/content_param_traits.h"
@@ skipping 86 matching lines @@
   IPC_STRUCT_TRAITS_MEMBER(surface_id)
   IPC_STRUCT_TRAITS_MEMBER(vsync_timebase)
   IPC_STRUCT_TRAITS_MEMBER(vsync_interval)
 IPC_STRUCT_TRAITS_END()
 #endif
 
 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)
+  IPC_STRUCT_TRAITS_MEMBER(disable_web_rtc_hw_encoding)
+#endif
+#if defined(OS_WIN)
+  IPC_STRUCT_TRAITS_MEMBER(enable_accelerated_vpx_decode)
+#endif
   IPC_STRUCT_TRAITS_MEMBER(compile_shader_always_succeeds)
   IPC_STRUCT_TRAITS_MEMBER(disable_gl_error_limit)
   IPC_STRUCT_TRAITS_MEMBER(disable_glsl_translator)
   IPC_STRUCT_TRAITS_MEMBER(disable_gpu_driver_bug_workarounds)
   IPC_STRUCT_TRAITS_MEMBER(disable_shader_name_hashing)
   IPC_STRUCT_TRAITS_MEMBER(enable_gpu_command_logging)
   IPC_STRUCT_TRAITS_MEMBER(enable_gpu_debugging)
   IPC_STRUCT_TRAITS_MEMBER(enable_gpu_service_logging_gpu)
   IPC_STRUCT_TRAITS_MEMBER(disable_gpu_program_cache)
   IPC_STRUCT_TRAITS_MEMBER(enforce_gl_minimums)
@@ skipping 178 matching lines @@
 // so the browser should stop sending the corresponding information
 IPC_MESSAGE_CONTROL2(GpuHostMsg_RemoveSubscription,
                      int32_t /* client_id */,
                      unsigned int /* target */)
 
 // 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 */)