AU: Skip all automatic update checks if OOBE is not complete.

utils.cc

Index: utils.cc
diff --git a/utils.cc b/utils.cc
index 1d1cb7d51a5a63cf32bd1b1e4db2b02fa83c7bfe..e0f20cf0064fe386956a449dd2060e3d0709e73d 100644
--- a/utils.cc
+++ b/utils.cc
@@ -37,6 +37,8 @@ namespace chromeos_update_engine {
 
 namespace utils {
 
+static const char kOOBECompletedMarker[] = "/home/chronos/.oobe_completed";
+
 bool IsOfficialBuild() {
   OmahaRequestDeviceParams params;
   if (!params.Init("", "")) {
@@ -46,6 +48,10 @@ bool IsOfficialBuild() {
       params.app_track != "developer-build";
 }
 
+bool IsOOBEComplete() {
+  return file_util::PathExists(FilePath(kOOBECompletedMarker));
+}
+
 bool WriteFile(const char* path, const char* data, int data_len) {
   DirectFileWriter writer;
   TEST_AND_RETURN_FALSE_ERRNO(0 == writer.Open(path,