Revert of gpu: GPU service scheduler.

gpu/ipc/common/gpu_preferences_struct_traits.h

Index: gpu/ipc/common/gpu_preferences_struct_traits.h
diff --git a/gpu/ipc/common/gpu_preferences_struct_traits.h b/gpu/ipc/common/gpu_preferences_struct_traits.h
index 15f5bbd6940a91b0784d22452e17a2bfefcfa3eb..0f2a121e08ec09f08afa45ebd993d57eea9c56a8 100644
--- a/gpu/ipc/common/gpu_preferences_struct_traits.h
+++ b/gpu/ipc/common/gpu_preferences_struct_traits.h
@@ -55,7 +55,6 @@
     out->single_process = prefs.single_process();
     out->in_process_gpu = prefs.in_process_gpu();
     out->ui_prioritize_in_gpu_process = prefs.ui_prioritize_in_gpu_process();
-    out->enable_gpu_scheduler = prefs.enable_gpu_scheduler();
     out->disable_accelerated_video_decode =
         prefs.disable_accelerated_video_decode();
 
@@ -115,9 +114,6 @@
   static bool ui_prioritize_in_gpu_process(const gpu::GpuPreferences& prefs) {
     return prefs.ui_prioritize_in_gpu_process;
   }
-  static bool enable_gpu_scheduler(const gpu::GpuPreferences& prefs) {
-    return prefs.enable_gpu_scheduler;
-  }
   static bool disable_accelerated_video_decode(
       const gpu::GpuPreferences& prefs) {
     return prefs.disable_accelerated_video_decode;