clean up printing::Image and printing::Metafile

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 <stdint.h>
 
 #include <algorithm>
 
 #include "base/files/file_util.h"
 #include "base/md5.h"
 #include "base/numerics/safe_conversions.h"
 #include "base/strings/string_number_conversions.h"
 #include "printing/metafile.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/gfx/codec/png_codec.h"
 
 namespace printing {
 
-Image::Image(const Metafile& metafile)
-    : row_length_(0),
-      ignore_alpha_(true) {
-  LoadMetafile(metafile);
+Image::Image(const void* metafile_src_buffer, size_t metafile_src_buffer_size)
+    : row_length_(0), ignore_alpha_(true) {
+  LoadMetafile(metafile_src_buffer, metafile_src_buffer_size);
 }
 
 Image::Image(const Image& image)
     : size_(image.size_),
       row_length_(image.row_length_),
       data_(image.data_),
       ignore_alpha_(image.ignore_alpha_) {
 }
 
 Image::~Image() {}
@@ skipping 88 matching lines @@
   int h;
   bool success = gfx::PNGCodec::Decode(
       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_t);
   return success;
 }
 
 }  // namespace printing