Move ReadFileToString to the base namespace.

chrome/utility/extensions/unpacker.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/utility/extensions/unpacker.h"
 
 #include <set>
 
 #include "base/file_util.h"
 #include "base/files/file_enumerator.h"
@@ skipping 28 matching lines @@
 
 namespace {
 
 // A limit to stop us passing dangerously large canvases to the browser.
 const int kMaxImageCanvas = 4096 * 4096;
 
 SkBitmap DecodeImage(const base::FilePath& path) {
   // Read the file from disk.
   std::string file_contents;
   if (!base::PathExists(path) ||
-      !file_util::ReadFileToString(path, &file_contents)) {
+      !base::ReadFileToString(path, &file_contents)) {
     return SkBitmap();
   }
 
   // Decode the image using WebKit's image decoder.
   const unsigned char* data =
       reinterpret_cast<const unsigned char*>(file_contents.data());
   SkBitmap bitmap = content::DecodeImage(data,
                                          gfx::Size(),
                                          file_contents.length());
   Sk64 bitmap_size = bitmap.getSize64();
@@ skipping 255 matching lines @@
 
 void Unpacker::SetError(const std::string &error) {
   SetUTF16Error(UTF8ToUTF16(error));
 }
 
 void Unpacker::SetUTF16Error(const string16 &error) {
   error_message_ = error;
 }
 
 }  // namespace extensions