Revert of gpu: GPU service scheduler.

services/ui/public/cpp/gpu/gpu.cc

Index: services/ui/public/cpp/gpu/gpu.cc
diff --git a/services/ui/public/cpp/gpu/gpu.cc b/services/ui/public/cpp/gpu/gpu.cc
index e70ca6f40e086283d15d5e920457bafce42b3c8f..e0073d5d174cffd0ed178768ececa925dab01573 100644
--- a/services/ui/public/cpp/gpu/gpu.cc
+++ b/services/ui/public/cpp/gpu/gpu.cc
@@ -7,7 +7,6 @@
 #include "base/memory/ptr_util.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "build/build_config.h"
-#include "gpu/command_buffer/common/scheduling_priority.h"
 #include "mojo/public/cpp/bindings/sync_call_restrictions.h"
 #include "mojo/public/cpp/system/platform_handle.h"
 #include "services/service_manager/public/cpp/connector.h"
@@ -60,12 +59,8 @@
 
 scoped_refptr<cc::ContextProvider> Gpu::CreateContextProvider(
     scoped_refptr<gpu::GpuChannelHost> gpu_channel) {
-  int32_t stream_id = 0;
-  gpu::SchedulingPriority stream_priority = gpu::SchedulingPriority::kNormal;
-
   constexpr bool automatic_flushes = false;
   constexpr bool support_locking = false;
-
   gpu::gles2::ContextCreationAttribHelper attributes;
   attributes.alpha_size = -1;
   attributes.depth_size = 0;
@@ -74,11 +69,12 @@
   attributes.sample_buffers = 0;
   attributes.bind_generates_resource = false;
   attributes.lose_context_when_out_of_memory = true;
-  ui::ContextProviderCommandBuffer* shared_context_provider = nullptr;
+  constexpr ui::ContextProviderCommandBuffer* shared_context_provider = nullptr;
   return make_scoped_refptr(new ui::ContextProviderCommandBuffer(
-      std::move(gpu_channel), stream_id, stream_priority,
-      gpu::kNullSurfaceHandle, GURL("chrome://gpu/MusContextFactory"),
-      automatic_flushes, support_locking, gpu::SharedMemoryLimits(), attributes,
+      std::move(gpu_channel), gpu::GPU_STREAM_DEFAULT,
+      gpu::GpuStreamPriority::NORMAL, gpu::kNullSurfaceHandle,
+      GURL("chrome://gpu/MusContextFactory"), automatic_flushes,
+      support_locking, gpu::SharedMemoryLimits(), attributes,
       shared_context_provider, ui::command_buffer_metrics::MUS_CLIENT_CONTEXT));
 }