InProcessCommandBuffer::OnWaitSyncTokenCompleted should not enqueue a…

… new task.

Instead it should simply schedule the service to process tasks again.

BUG=NONE
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel

Review-Url: https://codereview.chromium.org/2815023004
Cr-Commit-Position: refs/heads/master@{#464188}

gpu/ipc/in_process_command_buffer.cc

@@ -884,8 +884,8 @@ void InProcessCommandBuffer::OnWaitSyncTokenCompleted(
   mailbox_manager->PullTextureUpdates(sync_token);
   waiting_for_sync_point_ = false;
   executor_->SetScheduled(true);
-  QueueTask(false, base::Bind(&InProcessCommandBuffer::FlushOnGpuThread,
-                              gpu_thread_weak_ptr_, last_put_offset_));
+  service_->ScheduleTask(base::Bind(
+      &InProcessCommandBuffer::ProcessTasksOnGpuThread, gpu_thread_weak_ptr_));
 }
 
 void InProcessCommandBuffer::DescheduleUntilFinishedOnGpuThread() {