Addressing C4267 warnings for printing.

printing/pdf_metafile_cg_mac.cc

 // 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.
 
 #include "printing/pdf_metafile_cg_mac.h"
 
 #include <stdint.h>
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "base/mac/mac_util.h"
 #include "base/mac/scoped_cftyperef.h"
+#include "base/numerics/safe_conversions.h"
 #include "base/strings/sys_string_conversions.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/size.h"
 
 using base::ScopedCFTypeRef;
 
 namespace {
 
 // Rotate a page by |num_rotations| * 90 degrees, counter-clockwise.
 void RotatePage(CGContextRef context, const CGRect rect, int num_rotations) {
@@ skipping 56 matching lines @@
   context_.reset(CGPDFContextCreate(pdf_consumer, nullptr, nullptr));
   if (!context_.get()) {
     LOG(ERROR) << "Failed to create pdf context for metafile";
     pdf_data_.reset();
   }
 
   return true;
 }
 
 bool PdfMetafileCg::InitFromData(const void* src_buffer,
-                                 uint32_t src_buffer_size) {
+                                 size_t src_buffer_size) {
   DCHECK(!context_.get());
   DCHECK(!pdf_data_.get());
 
-  if (!src_buffer || src_buffer_size == 0) {
+  if (!src_buffer || !src_buffer_size)
     return false;
-  }
+
+  if (!base::IsValueInRangeForNumericType<CFIndex>(src_buffer_size))
+    return false;
 
   pdf_data_.reset(CFDataCreateMutable(kCFAllocatorDefault, src_buffer_size));
   CFDataAppendBytes(pdf_data_, static_cast<const UInt8*>(src_buffer),
                     src_buffer_size);
 
   return true;
 }
 
 void PdfMetafileCg::StartPage(const gfx::Size& page_size,
                               const gfx::Rect& content_area,
@@ skipping 182 matching lines @@
 
   if (!pdf_doc_.get()) {
     ScopedCFTypeRef<CGDataProviderRef> pdf_data_provider(
         CGDataProviderCreateWithCFData(pdf_data_));
     pdf_doc_.reset(CGPDFDocumentCreateWithProvider(pdf_data_provider));
   }
   return pdf_doc_.get();
 }
 
 }  // namespace printing