AU: Include a bit flag (bit 31) in error codes to indicate non-normal boot mode.

utils_unittest.cc

 // Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <errno.h>
 
 #include <map>
 #include <string>
@@ skipping 11 matching lines @@
 
 namespace chromeos_update_engine {
 
 class UtilsTest : public ::testing::Test { };
 
 TEST(UtilsTest, IsOfficialBuild) {
   // Pretty lame test...
   EXPECT_TRUE(utils::IsOfficialBuild());
 }
 
+TEST(UtilsTest, IsNormalBootMode) {
+  // Pretty lame test...
+  EXPECT_FALSE(utils::IsNormalBootMode());
+}
+
 TEST(UtilsTest, NormalizePathTest) {
   EXPECT_EQ("", utils::NormalizePath("", false));
   EXPECT_EQ("", utils::NormalizePath("", true));
   EXPECT_EQ("/", utils::NormalizePath("/", false));
   EXPECT_EQ("", utils::NormalizePath("/", true));
   EXPECT_EQ("/", utils::NormalizePath("//", false));
   EXPECT_EQ("", utils::NormalizePath("//", true));
   EXPECT_EQ("foo", utils::NormalizePath("foo", false));
   EXPECT_EQ("foo", utils::NormalizePath("foo", true));
   EXPECT_EQ("/foo/", utils::NormalizePath("/foo//", false));
@@ skipping 207 matching lines @@
       img.c_str())));
   EXPECT_EQ(20 * 1024 * 1024, utils::FileSize(img));
   int block_count = 0;
   int block_size = 0;
   EXPECT_TRUE(utils::GetFilesystemSize(img, &block_count, &block_size));
   EXPECT_EQ(4096, block_size);
   EXPECT_EQ(10 * 1024 * 1024 / 4096, block_count);
 }
 
 }  // namespace chromeos_update_engine