cc/blimp: Add synchronization for scroll/scale state.

cc/BUILD.gn

Index: cc/BUILD.gn
diff --git a/cc/BUILD.gn b/cc/BUILD.gn
index 00ede9cc2a9e36cb7f78304e44894ce03d6aad72..5ba02ea095d0ace41cda805ee8ff8c337500e153 100644
--- a/cc/BUILD.gn
+++ b/cc/BUILD.gn
@@ -49,7 +49,6 @@ component("cc") {
     "blimp/compositor_proto_state.h",
     "blimp/compositor_state_deserializer.cc",
     "blimp/compositor_state_deserializer.h",
-    "blimp/compositor_state_deserializer_client.h",
     "blimp/deserialized_content_layer_client.cc",
     "blimp/deserialized_content_layer_client.h",
     "blimp/engine_picture_cache.h",
@@ -64,6 +63,7 @@ component("cc") {
     "blimp/remote_compositor_bridge.cc",
     "blimp/remote_compositor_bridge.h",
     "blimp/remote_compositor_bridge_client.h",
+    "blimp/synced_property_remote.h",
     "debug/benchmark_instrumentation.cc",
     "debug/benchmark_instrumentation.h",
     "debug/debug_colors.cc",
@@ -850,6 +850,7 @@ test("cc_unittests") {
     "blimp/compositor_state_deserializer_unittest.cc",
     "blimp/layer_tree_host_remote_unittest.cc",
     "blimp/picture_data_conversions_unittest.cc",
+    "blimp/synced_property_remote_unittest.cc",
     "debug/layer_tree_debug_state_unittest.cc",
     "debug/micro_benchmark_controller_unittest.cc",
     "debug/rendering_stats_unittest.cc",