Addressing C4267 warnings for printing.

printing/metafile.h

 // Copyright (c) 2012 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.
 
 #ifndef PRINTING_METAFILE_H_
 #define PRINTING_METAFILE_H_
 
 #include <stdint.h>
 
 #include <vector>
@@ skipping 96 matching lines @@
 
   // Initializes a fresh new metafile for rendering. Returns false on failure.
   // Note: It should only be called from within the renderer process to allocate
   // rendering resources.
   virtual bool Init() = 0;
 
   // Initializes the metafile with the data in |src_buffer|. Returns true
   // on success.
   // Note: It should only be called from within the browser process.
   virtual bool InitFromData(const void* src_buffer,
-                            uint32_t src_buffer_size) = 0;
+                            size_t src_buffer_size) = 0;
 
   // Prepares a context for rendering a new page with the given |page_size|,
   // |content_area| and a |scale_factor| to use for the drawing. The units are
   // in points (=1/72 in).
   virtual void StartPage(const gfx::Size& page_size,
                          const gfx::Rect& content_area,
                          const float& scale_factor) = 0;
 
   // Closes the current page and destroys the context used in rendering that
   // page. The results of current page will be appended into the underlying
@@ skipping 35 matching lines @@
   bool GetDataAsVector(std::vector<char>* buffer) const override;
   bool SaveTo(base::File* file) const override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(Metafile);
 };
 
 }  // namespace printing
 
 #endif  // PRINTING_METAFILE_H_