Move ReadFileToString to the base namespace.

chrome/browser/net/transport_security_persister_unittest.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/net/transport_security_persister.h"
 
 #include <map>
 #include <string>
 #include <vector>
 
@@ skipping 124 matching lines @@
   // just do it directly rather than call persister_->StateIsDirty. (That uses
   // ImportantFileWriter, which has an asynchronous commit interval rather
   // than block.) Use a different basename just for cleanliness.
   base::FilePath path =
       temp_dir_.path().AppendASCII("TransportSecurityPersisterTest");
   EXPECT_TRUE(file_util::WriteFile(path, serialized.c_str(),
                                    serialized.size()));
 
   // Read the data back.
   std::string persisted;
-  EXPECT_TRUE(file_util::ReadFileToString(path, &persisted));
+  EXPECT_TRUE(base::ReadFileToString(path, &persisted));
   EXPECT_EQ(persisted, serialized);
   bool dirty;
   EXPECT_TRUE(persister_->LoadEntries(persisted, &dirty));
   EXPECT_FALSE(dirty);
 
   // Check that states are the same as saved.
   size_t count = 0;
   TransportSecurityState::Iterator j(state_);
   while (j.HasNext()) {
     count++;
@@ skipping 46 matching lines @@
   std::string ser;
   EXPECT_TRUE(persister_->SerializeData(&ser));
   bool dirty;
   EXPECT_TRUE(persister_->LoadEntries(ser, &dirty));
   EXPECT_TRUE(state_.GetDomainState(kTestDomain, false, &domain_state));
   EXPECT_EQ(1u, domain_state.dynamic_spki_hashes.size());
   EXPECT_EQ(sha1.tag, domain_state.dynamic_spki_hashes[0].tag);
   EXPECT_EQ(0, memcmp(domain_state.dynamic_spki_hashes[0].data(), sha1.data(),
                       sha1.size()));
 }