Build libraries for a number of services.

services/ui/input_manager/BUILD.gn

Index: services/ui/input_manager/BUILD.gn
diff --git a/services/ui/input_manager/BUILD.gn b/services/ui/input_manager/BUILD.gn
index 0fd3ecf1fe7cf90f92c94583cf514027d3c8be0f..a9bc0f81ce589972eb163a77b4e6ed7a6d5e70c2 100644
--- a/services/ui/input_manager/BUILD.gn
+++ b/services/ui/input_manager/BUILD.gn
@@ -9,6 +9,17 @@ mojo_native_application("input_manager") {
   output_name = "input_manager_service"
 
   sources = [
+    "main.cc",
+  ]
+
+  deps = [
+    ":lib",
+    "//mojo/application",
+  ]
+}
+
+source_set("lib") {
+  sources = [
     "input_associate.cc",
     "input_associate.h",
     "input_connection_impl.cc",
@@ -17,7 +28,6 @@ mojo_native_application("input_manager") {
     "input_dispatcher_impl.h",
     "input_manager_app.cc",
     "input_manager_app.h",
-    "main.cc",
   ]
 
   deps = [