Get rid of gpu related switches by passing gpu::GpuPreferences via IPC.

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"
 #include "content/common/gpu/establish_channel_params.h"
 #include "content/common/gpu/gpu_memory_uma_stats.h"
 #include "content/common/gpu/gpu_process_launch_causes.h"
 #include "content/public/common/common_param_traits.h"
 #include "content/public/common/gpu_memory_stats.h"
 #include "gpu/command_buffer/common/sync_token.h"
 #include "gpu/command_buffer/common/value_state.h"
+#include "gpu/command_buffer/service/gpu_preferences.h"
 #include "gpu/config/gpu_info.h"
 #include "ipc/ipc_channel_handle.h"
 #include "ipc/ipc_message_macros.h"
 #include "ipc/ipc_message_start.h"
 #include "ui/gfx/gpu_memory_buffer.h"
 #include "ui/gfx/ipc/gfx_param_traits.h"
 #include "ui/gfx/native_widget_types.h"
 #include "url/gurl.h"
 
 #if defined(OS_MACOSX)
@@ skipping 64 matching lines @@
 IPC_STRUCT_TRAITS_END()
 
 IPC_STRUCT_TRAITS_BEGIN(content::BufferPresentedParams)
   // The vsync parameters, to synchronize presentation with the display.
   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(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)
+  IPC_STRUCT_TRAITS_MEMBER(force_gpu_mem_available)
+  IPC_STRUCT_TRAITS_MEMBER(gpu_program_cache_size)
+  IPC_STRUCT_TRAITS_MEMBER(disable_gpu_shader_disk_cache)
+  IPC_STRUCT_TRAITS_MEMBER(enable_share_group_async_texture_upload)
+  IPC_STRUCT_TRAITS_MEMBER(enable_subscribe_uniform_extension)
+  IPC_STRUCT_TRAITS_MEMBER(enable_threaded_texture_mailboxes)
+  IPC_STRUCT_TRAITS_MEMBER(gl_shader_interm_output)
+  IPC_STRUCT_TRAITS_MEMBER(emulate_shader_precision)
+  IPC_STRUCT_TRAITS_MEMBER(enable_gpu_service_logging)
+  IPC_STRUCT_TRAITS_MEMBER(enable_gpu_service_tracing)
+  IPC_STRUCT_TRAITS_MEMBER(enable_unsafe_es3_apis)
+IPC_STRUCT_TRAITS_END()
+
 //------------------------------------------------------------------------------
 // GPU Messages
 // These are messages from the browser to the GPU process.
 
 // Tells the GPU process to initialize itself. The browser explicitly
 // requests this be done so that we are guaranteed that the channel is set
 // up between the browser and GPU process before doing any work that might
 // potentially crash the GPU process. Detection of the child process
 // exiting abruptly is predicated on having the IPC channel set up.
-IPC_MESSAGE_CONTROL0(GpuMsg_Initialize)
+IPC_MESSAGE_CONTROL1(GpuMsg_Initialize,
+                     gpu::GpuPreferences /* gpu_prefernces */)
 
 // Tells the GPU process to shutdown itself.
 IPC_MESSAGE_CONTROL0(GpuMsg_Finalize)
 
 // Tells the GPU process to create a new channel for communication with a
 // given client.  The channel name is returned in a
 // GpuHostMsg_ChannelEstablished message.  The client ID is passed so
 // that the GPU process reuses an existing channel to that process if it exists.
 // This ID is a unique opaque identifier generated by the browser process.
 // The client_tracing_id is a unique ID used for the purposes of tracing.
@@ skipping 144 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 */)