views: add layout delegates

ui/harmony/BUILD.gn

Index: ui/harmony/BUILD.gn
diff --git a/extensions/browser/api/diagnostics/BUILD.gn b/ui/harmony/BUILD.gn
similarity index 52%
copy from extensions/browser/api/diagnostics/BUILD.gn
copy to ui/harmony/BUILD.gn
index 27c64ce6648e3daa6adf214cc520362fa0741023..2a0d5b3bacbab5bbba2875eb052192899ea52db7 100644
--- a/extensions/browser/api/diagnostics/BUILD.gn
+++ b/ui/harmony/BUILD.gn
@@ -2,16 +2,17 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-assert(is_chromeos)
+import("//build/config/ui.gni")
 
-source_set("diagnostics") {
+component("harmony") {
   sources = [
-    "diagnostics_api.cc",
-    "diagnostics_api.h",
-    "diagnostics_api_chromeos.cc",
+    "harmony_layout_delegate.cc",
+    "harmony_layout_delegate.h",
   ]
 
+  defines = [ "HARMONY_IMPLEMENTATION" ]
+
   deps = [
-    "//extensions/common/api",
+    "//ui/views",
   ]
 }