Move mojo/services/public/cpp TypeConverters to mojo/converters.

mojo/services/public/cpp/view_manager/BUILD.gn

Index: mojo/services/public/cpp/view_manager/BUILD.gn
diff --git a/mojo/services/public/cpp/view_manager/BUILD.gn b/mojo/services/public/cpp/view_manager/BUILD.gn
index a505893865eece7f40127c69cc41521e77865917..91d497113e0a2515dfacaf456a230f8d65019bb8 100644
--- a/mojo/services/public/cpp/view_manager/BUILD.gn
+++ b/mojo/services/public/cpp/view_manager/BUILD.gn
@@ -28,11 +28,10 @@ source_set("view_manager") {
   deps = [
     "//base",
     "//mojo/application",
+    "//mojo/converters",
     "//mojo/public/c/gles2",
     "//mojo/public/cpp/bindings:bindings",
     "//mojo/public/interfaces/application",
-    "//mojo/services/public/cpp/geometry",
-    "//mojo/services/public/cpp/surfaces",
     "//mojo/services/public/interfaces/geometry",
     "//mojo/services/public/interfaces/input_events:input_events",
     "//mojo/services/public/interfaces/surfaces:surface_id",