AU: Nit I forgot to check in (TBR)

delta_diff_generator.cc

 // Copyright (c) 2009 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 "update_engine/delta_diff_generator.h"
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <algorithm>
@@ skipping 435 matching lines @@
   TEST_AND_RETURN_FALSE(utils::WriteAll(blobs_fd, &data_bz[0], data_bz.size()));
   *blobs_length += data_bz.size();
 
   off_t new_part_size = utils::FileSize(new_kernel_part);
   TEST_AND_RETURN_FALSE(new_part_size >= 0);
 
   op->set_data_length(data_bz.size());
 
   op->set_dst_length(new_part_size);
 
-  // Theres a single dest extent
+  // There's a single dest extent
   Extent* dst_extent = op->add_dst_extents();
   dst_extent->set_start_block(0);
   dst_extent->set_num_blocks((new_part_size + kBlockSize - 1) / kBlockSize);
 
   LOG(INFO) << "Done compressing kernel partition.";
   return true;
 }
 
 }  // namespace {}
 
@@ skipping 513 matching lines @@
 
   LOG(INFO) << "All done. Successfully created delta file.";
   return true;
 }
 
 const char* const kBsdiffPath = "/usr/bin/bsdiff";
 const char* const kBspatchPath = "/usr/bin/bspatch";
 const char* const kDeltaMagic = "CrAU";
 
 };  // namespace chromeos_update_engine