base: Make RefCountedBytes::TakeVector return ref ptr instead of raw ptr

chrome/browser/themes/browser_theme_pack.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 "chrome/browser/themes/browser_theme_pack.h"
 
 #include <limits.h>
 #include <stddef.h>
 
 #include <limits>
@@ skipping 371 matching lines @@
 // the left and the right of the web contents.
 bool HasFrameBorder() {
 #if defined(OS_CHROMEOS) || defined(OS_MACOSX)
   return false;
 #else
   return true;
 #endif
 }
 
 // Returns a piece of memory with the contents of the file |path|.
-base::RefCountedMemory* ReadFileData(const base::FilePath& path) {
+scoped_refptr<base::RefCountedMemory> ReadFileData(const base::FilePath& path) {
   if (!path.empty()) {
     base::File file(path, base::File::FLAG_OPEN | base::File::FLAG_READ);
     if (file.IsValid()) {
       int64_t length = file.GetLength();
       if (length > 0 && length < INT_MAX) {
         int size = static_cast<int>(length);
         std::vector<unsigned char> raw_data;
         raw_data.resize(size);
         char* data = reinterpret_cast<char*>(&(raw_data.front()));
         if (file.ReadAtCurrentPos(data, size) == length)
           return base::RefCountedBytes::TakeVector(&raw_data);
       }
     }
   }
 
-  return NULL;
+  return nullptr;
 }
 
 // Shifts an image's HSL values. The caller is responsible for deleting
 // the returned image.
 gfx::Image CreateHSLShiftedImage(const gfx::Image& image,
                                  const color_utils::HSL& hsl_shift) {
   const gfx::ImageSkia* src_image = image.ToImageSkia();
   return gfx::Image(gfx::ImageSkiaOperations::CreateHSLShiftedImage(
       *src_image, hsl_shift));
 }
@@ skipping 1123 matching lines @@
                                            false,
                                            &bitmap_data)) {
       NOTREACHED() << "Unable to encode theme image for prs_id="
                    << prs_id << " for scale_factor=" << scale_factors_[i];
       break;
     }
     image_memory_[scaled_raw_id] =
         base::RefCountedBytes::TakeVector(&bitmap_data);
   }
 }