Make a pure mojo::View version of the aura::Window FocusController.

sky/BUILD.gn

Index: sky/BUILD.gn
diff --git a/sky/BUILD.gn b/sky/BUILD.gn
index ee665ca6e7a7b1cac95eea1433a0a65c25b60426..5a686fbbd74fa703890a7dce6a2683e1ad2b0001 100644
--- a/sky/BUILD.gn
+++ b/sky/BUILD.gn
@@ -14,14 +14,10 @@ group("sky") {
     "//sky/engine/web:sky_unittests",
     "//sky/engine/wtf:unittests",
     "//sky/services/inspector",
+    "//sky/tools/debugger",
+    "//sky/tools/tester",
     "//sky/viewer",
   ]
-  if (use_aura) {
-    deps += [
-      "//sky/tools/debugger",
-      "//sky/tools/tester",
-    ]
-  }
   if (!is_android) {
     deps += [ "//third_party/mesa:osmesa" ]
   }