Revert of gpu: GPU service scheduler.

gpu/ipc/service/gpu_channel_manager.h

Index: gpu/ipc/service/gpu_channel_manager.h
diff --git a/gpu/ipc/service/gpu_channel_manager.h b/gpu/ipc/service/gpu_channel_manager.h
index 0ce987a5e6b75eb3d7ad19bebba4ce53f6ab7b09..b0a183acdecf95737c3118ebb08cdec3d07f54e1 100644
--- a/gpu/ipc/service/gpu_channel_manager.h
+++ b/gpu/ipc/service/gpu_channel_manager.h
@@ -37,7 +37,6 @@
 class GpuDriverBugWorkarounds;
 struct GpuPreferences;
 class PreemptionFlag;
-class Scheduler;
 class SyncPointManager;
 struct SyncToken;
 namespace gles2 {
@@ -65,7 +64,6 @@
                     GpuWatchdogThread* watchdog,
                     scoped_refptr<base::SingleThreadTaskRunner> task_runner,
                     scoped_refptr<base::SingleThreadTaskRunner> io_task_runner,
-                    Scheduler* scheduler,
                     SyncPointManager* sync_point_manager,
                     GpuMemoryBufferFactory* gpu_memory_buffer_factory,
                     const GpuFeatureInfo& gpu_feature_info,
@@ -124,8 +122,6 @@
 
   gl::GLShareGroup* share_group() const { return share_group_.get(); }
 
-  SyncPointManager* sync_point_manager() const { return sync_point_manager_; }
-
  private:
   void InternalDestroyGpuMemoryBuffer(gfx::GpuMemoryBufferId id, int client_id);
   void InternalDestroyGpuMemoryBufferOnIO(gfx::GpuMemoryBufferId id,
@@ -151,12 +147,9 @@
   GpuWatchdogThread* watchdog_;
 
   scoped_refptr<gl::GLShareGroup> share_group_;
-
+  scoped_refptr<gles2::MailboxManager> mailbox_manager_;
   scoped_refptr<PreemptionFlag> preemption_flag_;
-
-  scoped_refptr<gles2::MailboxManager> mailbox_manager_;
   GpuMemoryManager gpu_memory_manager_;
-  Scheduler* scheduler_;
   // SyncPointManager guaranteed to outlive running MessageLoop.
   SyncPointManager* sync_point_manager_;
   std::unique_ptr<gles2::ProgramCache> program_cache_;