Move FileEnumerator to its own file, do some refactoring.

content/test/image_decoder_test.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 "content/test/image_decoder_test.h"
 
 #include "base/file_util.h"
+#include "base/files/file_enumerator.h"
 #include "base/files/file_path.h"
 #include "base/md5.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/path_service.h"
 #include "base/string_util.h"
 #include "third_party/WebKit/public/platform/WebData.h"
 #include "third_party/WebKit/public/platform/WebImage.h"
 #include "third_party/WebKit/public/platform/WebSize.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebImageDecoder.h"
 
@@ skipping 96 matching lines @@
     LOG(INFO) << test_info->name() <<
                  " not running because test data wasn't found.";
     data_dir_.clear();
     return;
   }
 }
 
 std::vector<base::FilePath> ImageDecoderTest::GetImageFiles() const {
   std::string pattern = "*." + format_;
 
-  file_util::FileEnumerator enumerator(data_dir_,
-                                       false,
-                                       file_util::FileEnumerator::FILES);
+  base::FileEnumerator enumerator(data_dir_,
+                                  false,
+                                  base::FileEnumerator::FILES);
 
   std::vector<base::FilePath> image_files;
   base::FilePath next_file_name;
   while (!(next_file_name = enumerator.Next()).empty()) {
     base::FilePath base_name = next_file_name.BaseName();
 #if defined(OS_WIN)
     std::string base_name_ascii = WideToASCII(base_name.value());
 #else
     std::string base_name_ascii = base_name.value();
 #endif
@@ skipping 79 matching lines @@
   // Since WebImage does not expose get data by frame, get the size
   // through decoder and pass it to fromData so that the closest
   // image dats to the size is returned.
   WebKit::WebSize size(decoder->getImage(desired_frame_index).size());
   const WebKit::WebImage& image = WebKit::WebImage::fromData(data, size);
   SaveMD5Sum(md5_sum_path, image);
 #else
   VerifyImage(*decoder, image_path, md5_sum_path, desired_frame_index);
 #endif
 }