Revert of gpu: GPU service scheduler.

gpu/ipc/service/gpu_command_buffer_stub.cc

Index: gpu/ipc/service/gpu_command_buffer_stub.cc
diff --git a/gpu/ipc/service/gpu_command_buffer_stub.cc b/gpu/ipc/service/gpu_command_buffer_stub.cc
index fc4784fb3b499206635fbd6c3420b06649102bed..d140ddb407a9562112b5c2a26d0036abe00a4b26 100644
--- a/gpu/ipc/service/gpu_command_buffer_stub.cc
+++ b/gpu/ipc/service/gpu_command_buffer_stub.cc
@@ -31,7 +31,6 @@
 #include "gpu/command_buffer/service/memory_tracking.h"
 #include "gpu/command_buffer/service/preemption_flag.h"
 #include "gpu/command_buffer/service/query_manager.h"
-#include "gpu/command_buffer/service/scheduler.h"
 #include "gpu/command_buffer/service/service_utils.h"
 #include "gpu/command_buffer/service/sync_point_manager.h"
 #include "gpu/command_buffer/service/transfer_buffer_manager.h"
@@ -653,11 +652,8 @@
       channel_->sync_point_manager()->CreateSyncPointClientState(
           CommandBufferNamespace::GPU_IO, command_buffer_id_, sequence_id_);
 
-  if (channel_->scheduler()) {
-    executor_->SetPauseExecutionCallback(
-        base::Bind(&Scheduler::ShouldYield,
-                   base::Unretained(channel_->scheduler()), sequence_id_));
-  } else if (channel_->preempted_flag()) {
+  // TODO(sunnyps): Hook callback to gpu scheduler.
+  if (channel_->preempted_flag()) {
     executor_->SetPauseExecutionCallback(
         base::Bind(&PreemptionFlag::IsSet, channel_->preempted_flag()));
   }