Move some basic early process init into Service Manager

content/app/BUILD.gn

Index: content/app/BUILD.gn
diff --git a/content/app/BUILD.gn b/content/app/BUILD.gn
index 8d796eca93f48b12c79c737da9ad0b2e7ca9d460..dd6e95fa7187955bd8e7647e90078a5248ba6bce 100644
--- a/content/app/BUILD.gn
+++ b/content/app/BUILD.gn
@@ -27,7 +27,7 @@ template("implement_content_app") {
     "//content:sandbox_helper_win",
     "//content/public/common:common_sources",
     "//crypto",
-    "//services/service_manager/public/cpp",
+    "//services/service_manager/embedder",
     "//services/service_manager/public/interfaces",
     "//mojo/edk/system",
     "//ppapi/features",
@@ -99,8 +99,6 @@ template("implement_content_app") {
 
   source_set(main_target_name) {
     sources = [
-      "mac/mac_init.h",
-      "mac/mac_init.mm",
       "mojo/mojo_init.cc",
       "mojo/mojo_init.h",
     ]
@@ -125,6 +123,7 @@ template("implement_content_app") {
     deps = content_app_deps + [
              ":$runner_target_name",
              "//ipc",
+             "//services/service_manager/embedder",
            ]
     forward_variables_from(invoker,
                            [