Fixes an issue when the owner key is empty chrome would crash trying to access bogus memory.

chrome/browser/chromeos/login/owner_key_utils_unittest.cc

 // Copyright (c) 2011 The Chromium 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 "chrome/browser/chromeos/login/owner_key_utils.h"
 
 #include <string>
 #include <vector>
 
 #include "base/file_path.h"
@@ skipping 47 matching lines @@
 
   std::vector<uint8>::iterator pubkey_it;
   std::vector<uint8>::iterator disk_it;
   for (pubkey_it = public_key.begin(), disk_it = from_disk.begin();
        pubkey_it < public_key.end();
        pubkey_it++, disk_it++) {
     EXPECT_EQ(*pubkey_it, *disk_it);
   }
 }
 
+TEST_F(OwnerKeyUtilsTest, ImportPublicKeyFailed) {
+  ScopedTempDir tmpdir;
+  FilePath tmpfile;
+  ASSERT_TRUE(tmpdir.CreateUniqueTempDir());
+
+  // First test the case where the file is missing which should fail.
+  std::vector<uint8> from_disk;
+  ASSERT_FALSE(utils_->ImportPublicKey(tmpfile, &from_disk));
+
+  // Next try empty file. This should fail and the array should be empty.
+  from_disk.resize(10);
+  ASSERT_TRUE(file_util::CreateTemporaryFileInDir(tmpdir.path(), &tmpfile));
+  ASSERT_FALSE(utils_->ImportPublicKey(tmpfile, &from_disk));
+  ASSERT_FALSE(from_disk.size());
+}
+
 }  // namespace chromeos