mus: Split the gpu client-lib into a separate component.

ui/aura/BUILD.gn

Index: ui/aura/BUILD.gn
diff --git a/ui/aura/BUILD.gn b/ui/aura/BUILD.gn
index 8ad575c389f81f00f5b8393360d281e37575a12c..1c3f5955ac345a7d1e7c5e08e75286076ad1b83c 100644
--- a/ui/aura/BUILD.gn
+++ b/ui/aura/BUILD.gn
@@ -77,18 +77,10 @@ component("aura") {
     "mus/focus_synchronizer.cc",
     "mus/focus_synchronizer.h",
     "mus/focus_synchronizer_delegate.h",
-    "mus/gpu_memory_buffer_impl.cc",
-    "mus/gpu_memory_buffer_impl.h",
-    "mus/gpu_service.cc",
-    "mus/gpu_service.h",
     "mus/in_flight_change.cc",
     "mus/in_flight_change.h",
     "mus/input_method_mus.cc",
     "mus/input_method_mus.h",
-    "mus/mojo_gpu_memory_buffer.cc",
-    "mus/mojo_gpu_memory_buffer.h",
-    "mus/mojo_gpu_memory_buffer_manager.cc",
-    "mus/mojo_gpu_memory_buffer_manager.h",
     "mus/mus_context_factory.cc",
     "mus/mus_context_factory.h",
     "mus/mus_types.h",
@@ -152,7 +144,6 @@ component("aura") {
     "//base/third_party/dynamic_annotations",
     "//cc",
     "//cc/surfaces",
-    "//gpu/command_buffer/client",
     "//gpu/ipc/client",
     "//mojo/public/cpp/system",
     "//net",