Addressing C4267 warnings for printing.

printing/pdf_metafile_skia.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_PDF_METAFILE_SKIA_H_
 #define PRINTING_PDF_METAFILE_SKIA_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 20 matching lines @@
 struct PdfMetafileSkiaData;
 
 // This class uses Skia graphics library to generate a PDF document.
 class PRINTING_EXPORT PdfMetafileSkia : public Metafile {
  public:
   explicit PdfMetafileSkia(SkiaDocumentType type);
   ~PdfMetafileSkia() override;
 
   // Metafile methods.
   bool Init() override;
-  bool InitFromData(const void* src_buffer, uint32_t src_buffer_size) override;
+  bool InitFromData(const void* src_buffer, size_t src_buffer_size) override;
 
   void StartPage(const gfx::Size& page_size,
                  const gfx::Rect& content_area,
                  const float& scale_factor) override;
   bool FinishPage() override;
   bool FinishDocument() override;
 
   uint32_t GetDataSize() const override;
   bool GetData(void* dst_buffer, uint32_t dst_buffer_size) const override;
 
@@ skipping 31 matching lines @@
 
  private:
   std::unique_ptr<PdfMetafileSkiaData> data_;
 
   DISALLOW_COPY_AND_ASSIGN(PdfMetafileSkia);
 };
 
 }  // namespace printing
 
 #endif  // PRINTING_PDF_METAFILE_SKIA_H_