WIP GPU scheduler + delayed activation / tile draw

gpu/ipc/service/BUILD.gn

Index: gpu/ipc/service/BUILD.gn
diff --git a/gpu/ipc/service/BUILD.gn b/gpu/ipc/service/BUILD.gn
index 59ca51e04963891c4f5bf8153f827044640eaa56..c624dc2eba2e533bde3452c18a8ac7fa46a8745f 100644
--- a/gpu/ipc/service/BUILD.gn
+++ b/gpu/ipc/service/BUILD.gn
@@ -35,6 +35,7 @@ target(link_target_type, "ipc_service_sources") {
     "gpu_channel_manager_delegate.h",
     "gpu_command_buffer_stub.cc",
     "gpu_command_buffer_stub.h",
+    "gpu_command_stream.h",
     "gpu_config.h",
     "gpu_init.cc",
     "gpu_init.h",
@@ -44,6 +45,8 @@ target(link_target_type, "ipc_service_sources") {
     "gpu_memory_manager.h",
     "gpu_memory_tracking.cc",
     "gpu_memory_tracking.h",
+    "gpu_scheduler.cc",
+    "gpu_scheduler.h",
     "gpu_watchdog_thread.cc",
     "gpu_watchdog_thread.h",
     "image_transport_surface.h",
@@ -143,6 +146,7 @@ test("gpu_ipc_service_unittests") {
     "gpu_channel_test_common.cc",
     "gpu_channel_test_common.h",
     "gpu_channel_unittest.cc",
+    "gpu_scheduler_unittest.cc",
   ]
   deps = [
     ":service",