Clean up header files.

chrome/utility/cloud_print/pwg_encoder.cc

 // Copyright 2013 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/utility/cloud_print/pwg_encoder.h"
 
+#include <limits.h>
 #include <string.h>
 
 #include <algorithm>
 
 #include "base/big_endian.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/utility/cloud_print/bitmap_image.h"
 
 namespace cloud_print {
@@ skipping 240 matching lines @@
       // We reverse the iterators.
       EncodeRow<InputStruct>(std::reverse_iterator<const uint32_t*>(row_end),
                              std::reverse_iterator<const uint32_t*>(pos),
                              monochrome, output);
     }
   }
   return true;
 }
 
 }  // namespace cloud_print