Make printing build on Win64

printing/image.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 "printing/image.h"
 
 #include <algorithm>
 
 #include "base/file_util.h"
 #include "base/md5.h"
+#include "base/safe_numerics.h"
 #include "base/string_number_conversions.h"
 #include "printing/metafile.h"
 #include "printing/metafile_impl.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/gfx/codec/png_codec.h"
 
 namespace printing {
 
 Image::Image(const FilePath& path)
     : row_length_(0),
@@ skipping 43 matching lines @@
                                        gfx::PNGCodec::FORMAT_BGRA,
                                        size_,
                                        row_length_,
                                        true,
                                        std::vector<gfx::PNGCodec::Comment>(),
                                        &compressed);
   DCHECK(success && compressed.size());
   if (success) {
     int write_bytes = file_util::WriteFile(
         filepath,
-        reinterpret_cast<char*>(&*compressed.begin()), compressed.size());
+        reinterpret_cast<char*>(&*compressed.begin()),
+        base::checked_numeric_cast<int>(compressed.size()));
     success = (write_bytes == static_cast<int>(compressed.size()));
     DCHECK(success);
   }
   return success;
 }
 
 double Image::PercentageDifferent(const Image& rhs) const {
   if (size_.width() == 0 || size_.height() == 0 ||
     rhs.size_.width() == 0 || rhs.size_.height() == 0)
     return 100.;
@@ skipping 57 matching lines @@
       reinterpret_cast<const unsigned char*>(compressed.c_str()),
       compressed.size(), gfx::PNGCodec::FORMAT_BGRA, &data_, &w, &h);
   size_.SetSize(w, h);
   row_length_ = size_.width() * sizeof(uint32);
   return success;
 }
 
 bool Image::LoadMetafile(const std::string& data) {
   DCHECK(!data.empty());
   NativeMetafile metafile;
-  if (!metafile.InitFromData(data.data(), data.size()))
+  if (!metafile.InitFromData(data.data(),
+                             base::checked_numeric_cast<uint32>(data.size())))
     return false;
   return LoadMetafile(metafile);
 }
 
 }  // namespace printing