Fix CompositorResizeLock to do something.

ui/compositor/BUILD.gn

Index: ui/compositor/BUILD.gn
diff --git a/ui/compositor/BUILD.gn b/ui/compositor/BUILD.gn
index c0d3220e133fc6200ca2b739522b7fadac7fa622..b567d89f2fabc45c6f510ae647f83d77e222e0c8 100644
--- a/ui/compositor/BUILD.gn
+++ b/ui/compositor/BUILD.gn
@@ -21,6 +21,8 @@ component("compositor") {
     "compositor.h",
     "compositor_animation_observer.h",
     "compositor_export.h",
+    "compositor_lock.cc",
+    "compositor_lock.h",
     "compositor_observer.h",
     "compositor_switches.cc",
     "compositor_switches.h",
@@ -110,6 +112,8 @@ static_library("test_support") {
     "test/context_factories_for_test.h",
     "test/draw_waiter_for_test.cc",
     "test/draw_waiter_for_test.h",
+    "test/fake_compositor_lock.cc",
+    "test/fake_compositor_lock.h",
     "test/fake_context_factory.cc",
     "test/fake_context_factory.h",
     "test/in_process_context_factory.cc",