Move ReadFileToString to the base namespace.

chrome/browser/media_galleries/fileapi/media_file_validator_browsertest.cc

 // Copyright 2013 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 "base/basictypes.h"
 #include "base/bind.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 136 matching lines @@
         base::Bind(&MediaFileValidatorTest::CheckFiles,
                    base::Unretained(this), true,
                    base::Bind(&MediaFileValidatorTest::OnTestFilesReady,
                               base::Unretained(this), expected_result)));
   }
 
   void SetupFromFileOnFileThread(const std::string& filename,
                                  const base::FilePath& source,
                                  bool expected_result) {
     std::string content;
-    ASSERT_TRUE(file_util::ReadFileToString(source, &content));
+    ASSERT_TRUE(base::ReadFileToString(source, &content));
     SetupOnFileThread(filename, content, expected_result);
   }
 
   // Check that exactly one of |move_src_| and |move_dest_| exists.
   // |src_expected| indicates which one should exist.  When complete,
   // |callback| is called with success/failure.
   void CheckFiles(bool src_expected,
                   const base::Callback<void(bool success)>& callback) {
     CheckFile(move_src_, src_expected ? test_file_size_ : kNoFileSize,
               base::Bind(&MediaFileValidatorTest::OnCheckFilesFirstResult,
@@ skipping 106 matching lines @@
 }
 
 IN_PROC_BROWSER_TEST_F(MediaFileValidatorTest, ValidVideo) {
   base::FilePath test_file = GetMediaTestDir();
   ASSERT_FALSE(test_file.empty());
   test_file = test_file.AppendASCII("bear-320x240-multitrack.webm");
   MoveTestFromFile("multitrack.webm", test_file, true);
 }
 
 }  // namespace chrome