Refactor client visibility handling

cc/BUILD.gn

Index: cc/BUILD.gn
diff --git a/cc/BUILD.gn b/cc/BUILD.gn
index 7f649d87440855a53919c86dc66fc91d382444c3..6e0f567a272f30902bf636911c751fd5414c8837 100644
--- a/cc/BUILD.gn
+++ b/cc/BUILD.gn
@@ -209,6 +209,8 @@ component("cc") {
     "output/compositor_frame.h",
     "output/compositor_frame_metadata.cc",
     "output/compositor_frame_metadata.h",
+    "output/context_cache_controller.cc",
+    "output/context_cache_controller.h",
     "output/context_provider.h",
     "output/copy_output_request.cc",
     "output/copy_output_request.h",
@@ -856,6 +858,7 @@ test("cc_unittests") {
     "output/begin_frame_args_unittest.cc",
     "output/bsp_tree_unittest.cc",
     "output/buffer_to_texture_target_map_unittest.cc",
+    "output/context_cache_controller_unittest.cc",
     "output/delegating_renderer_unittest.cc",
     "output/filter_operations_unittest.cc",
     "output/gl_renderer_unittest.cc",