mus: Rename GpuService to Gpu.

services/ui/ws/window_server_test_base.h

Index: services/ui/ws/window_server_test_base.h
diff --git a/services/ui/ws/window_server_test_base.h b/services/ui/ws/window_server_test_base.h
index 6220c8c5b3715c6187fef2fd061468f4ff0ae528..47e6d57db6f4a543212b3b0be7de438266f343dd 100644
--- a/services/ui/ws/window_server_test_base.h
+++ b/services/ui/ws/window_server_test_base.h
@@ -24,7 +24,7 @@ class MusContextFactory;
 }
 
 namespace ui {
-class GpuService;
+class Gpu;
 
 // WindowServerTestBase is a base class for use with shell tests that use
 // WindowServer. SetUp() connects to the WindowServer and blocks until OnEmbed()
@@ -133,7 +133,7 @@ class WindowServerTestBase
   display::ScreenBase screen_;
   aura::PropertyConverter property_converter_;
 
-  std::unique_ptr<GpuService> gpu_service_;
+  std::unique_ptr<Gpu> gpu_;
   std::unique_ptr<aura::MusContextFactory> compositor_context_factory_;
 
   std::vector<std::unique_ptr<aura::WindowTreeClient>> window_tree_clients_;