services/ui: Remove unwanted gpu dependency from services/ui/surfaces.

services/ui/ws/frame_generator.cc

Index: services/ui/ws/frame_generator.cc
diff --git a/services/ui/ws/frame_generator.cc b/services/ui/ws/frame_generator.cc
index b46f17f6a6c2111c0b87c788748d3cf2ecfd9fc1..9f0e5222e1340a5f7e0113a8f1c7aec27ee2c208 100644
--- a/services/ui/ws/frame_generator.cc
+++ b/services/ui/ws/frame_generator.cc
@@ -10,6 +10,7 @@
 #include "cc/quads/render_pass_draw_quad.h"
 #include "cc/quads/shared_quad_state.h"
 #include "cc/quads/surface_draw_quad.h"
+#include "services/ui/gpu/gpu_service_internal.h"
 #include "services/ui/surfaces/display_compositor.h"
 #include "services/ui/ws/frame_generator_delegate.h"
 #include "services/ui/ws/server_window.h"
@@ -45,7 +46,9 @@ void FrameGenerator::OnAcceleratedWidgetAvailable(
     gfx::AcceleratedWidget widget) {
   if (widget != gfx::kNullAcceleratedWidget) {
     display_compositor_.reset(new DisplayCompositor(
-        base::ThreadTaskRunnerHandle::Get(), widget, surfaces_state_));
+        base::ThreadTaskRunnerHandle::Get(), widget,
+        GpuServiceInternal::GetInstance()->gpu_channel_local(),
+        surfaces_state_));
   }
 }