Move ReadFileToString to the base namespace.

content/common/page_state_serialization_unittest.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 <math.h>
 
 #include "base/base64.h"
 #include "base/file_util.h"
 #include "base/path_service.h"
 #include "base/pickle.h"
@@ skipping 198 matching lines @@
     if (version == 11)
       suffix = "_android";
 #endif
 
     base::FilePath path;
     PathService::Get(content::DIR_TEST_DATA, &path);
     path = path.AppendASCII("page_state").AppendASCII(
         base::StringPrintf("serialized_v%d%s.dat", version, suffix));
 
     std::string file_contents;
-    if (!file_util::ReadFileToString(path, &file_contents)) {
+    if (!base::ReadFileToString(path, &file_contents)) {
       ADD_FAILURE() << "File not found: " << path.value();
       return;
     }
 
     std::string trimmed_contents;
     EXPECT_TRUE(RemoveChars(file_contents, "\r\n", &trimmed_contents));
 
     std::string encoded;
     EXPECT_TRUE(base::Base64Decode(trimmed_contents, &encoded));
 
@@ skipping 192 matching lines @@
 TEST_F(PageStateSerializationTest, BackwardsCompat_v13) {
   TestBackwardsCompat(13);
 }
 
 TEST_F(PageStateSerializationTest, BackwardsCompat_v14) {
   TestBackwardsCompat(14);
 }
 
 }  // namespace
 }  // namespace content