cc: Remove client/engine LayerTreeHostInProcess.

cc/BUILD.gn

Index: cc/BUILD.gn
diff --git a/cc/BUILD.gn b/cc/BUILD.gn
index 3317502068293833d1bd3074e2423d108576ee08..f4ecf2cdaed4b889c9dc1c04876a733f7c09c428 100644
--- a/cc/BUILD.gn
+++ b/cc/BUILD.gn
@@ -553,11 +553,6 @@ component("cc") {
     "trees/proxy_impl.h",
     "trees/proxy_main.cc",
     "trees/proxy_main.h",
-    "trees/remote_channel_impl.cc",
-    "trees/remote_channel_impl.h",
-    "trees/remote_channel_main.cc",
-    "trees/remote_channel_main.h",
-    "trees/remote_proto_channel.h",
     "trees/scoped_abort_remaining_swap_promises.h",
     "trees/scroll_node.cc",
     "trees/scroll_node.h",
@@ -740,12 +735,14 @@ static_library("test_support") {
     "test/push_properties_counting_layer_impl.h",
     "test/remote_client_layer_factory.cc",
     "test/remote_client_layer_factory.h",
-    "test/remote_proto_channel_bridge.cc",
-    "test/remote_proto_channel_bridge.h",
+    "test/remote_compositor_test.cc",
+    "test/remote_compositor_test.h",
     "test/render_pass_test_utils.cc",
     "test/render_pass_test_utils.h",
     "test/scheduler_test_common.cc",
     "test/scheduler_test_common.h",
+    "test/serialization_test_utils.cc",
+    "test/serialization_test_utils.h",
     "test/skia_common.cc",
     "test/skia_common.h",
     "test/solid_color_content_layer_client.cc",
@@ -855,6 +852,7 @@ test("cc_unittests") {
     "base/unique_notifier_unittest.cc",
     "blimp/compositor_state_deserializer_unittest.cc",
     "blimp/layer_tree_host_remote_unittest.cc",
+    "blimp/layer_tree_host_unittest_serialization.cc",
     "blimp/picture_data_conversions_unittest.cc",
     "blimp/synced_property_remote_unittest.cc",
     "debug/layer_tree_debug_state_unittest.cc",
@@ -975,9 +973,7 @@ test("cc_unittests") {
     "trees/layer_tree_host_unittest_picture.cc",
     "trees/layer_tree_host_unittest_proxy.cc",
     "trees/layer_tree_host_unittest_record_gpu_histogram.cc",
-    "trees/layer_tree_host_unittest_remote_server.cc",
     "trees/layer_tree_host_unittest_scroll.cc",
-    "trees/layer_tree_host_unittest_serialization.cc",
     "trees/layer_tree_host_unittest_video.cc",
     "trees/layer_tree_impl_unittest.cc",
     "trees/occlusion_tracker_unittest.cc",