Splits window manager like methods into ViewManagerServiceDelegate

mojo/services/window_manager/BUILD.gn

Index: mojo/services/window_manager/BUILD.gn
diff --git a/mojo/services/window_manager/BUILD.gn b/mojo/services/window_manager/BUILD.gn
index 40b22f2657ad0e91e62a2aa579bd8131208c1fab..02f3a8eabf75c8ce57a7d37cb07007be81761500 100644
--- a/mojo/services/window_manager/BUILD.gn
+++ b/mojo/services/window_manager/BUILD.gn
@@ -28,8 +28,11 @@ source_set("lib") {
   sources = [
     "window_manager_app.cc",
     "window_manager_app.h",
+    "window_manager_delegate.h",
     "window_manager_service_impl.cc",
     "window_manager_service_impl.h",
+    "window_manager_service2_impl.cc",
+    "window_manager_service2_impl.h",
   ]
 
   public_deps = [
@@ -44,6 +47,7 @@ source_set("lib") {
     "//mojo/public/cpp/bindings",
     "//mojo/public/interfaces/application:application",
     "//mojo/services/public/cpp/view_manager",
+    "//mojo/services/public/interfaces/window_manager",
     "//mojo/services/public/interfaces/window_manager2",
     "//ui/aura",
     "//ui/base",
@@ -68,6 +72,7 @@ test("mojo_core_window_manager_unittests") {
     "//mojo/environment:chromium",
     "//mojo/services/public/cpp/view_manager",
     "//mojo/services/public/interfaces/view_manager",
+    "//mojo/services/public/interfaces/window_manager",
     "//mojo/services/public/interfaces/window_manager2",
     "//mojo/shell:test_support",
     "//testing/gtest",