cc:: Add remote mode to the compositor

cc/BUILD.gn

Index: cc/BUILD.gn
diff --git a/cc/BUILD.gn b/cc/BUILD.gn
index 9d3af1f2c526b7b70478b99cf817fc63fecd7a23..5c3d6d56fa01b0fa0bd7c170c5d4b92d31284ef8 100644
--- a/cc/BUILD.gn
+++ b/cc/BUILD.gn
@@ -516,6 +516,10 @@ 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/single_thread_proxy.cc",
@@ -671,6 +675,10 @@ source_set("test_support") {
     "test/proxy_impl_for_test.h",
     "test/proxy_main_for_test.cc",
     "test/proxy_main_for_test.h",
+    "test/remote_channel_impl_for_test.cc",
+    "test/remote_channel_impl_for_test.h",
+    "test/remote_proto_channel_bridge.cc",
+    "test/remote_proto_channel_bridge.h",
     "test/render_pass_test_utils.cc",
     "test/render_pass_test_utils.h",
     "test/scheduler_test_common.cc",
@@ -724,6 +732,7 @@ source_set("test_support") {
     "//base",
     "//base/test:test_support",
     "//base/third_party/dynamic_annotations",
+    "//cc/proto",
     "//cc/surfaces",
     "//cc/surfaces:surface_id",
     "//gpu/command_buffer/client:gl_in_process_context",
@@ -908,6 +917,7 @@ test("cc_unittests") {
     "trees/property_tree_unittest.cc",
     "trees/proxy_common_unittest.cc",
     "trees/proxy_impl_unittest.cc",
+    "trees/remote_channel_unittest.cc",
     "trees/threaded_channel_unittest.cc",
     "trees/tree_synchronizer_unittest.cc",