Move ReadFileToString to the base namespace.

net/cert/nss_cert_database_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 <cert.h>
 #include <certdb.h>
 #include <pk11pub.h>
 
 #include <algorithm>
 
@@ skipping 50 matching lines @@
     // NSSCertDatabase::NotifyObservers* get released.
     base::MessageLoop::current()->RunUntilIdle();
 
     EXPECT_EQ(0U, ListCertsInSlot(slot_->os_module_handle()).size());
   }
 
  protected:
   static std::string ReadTestFile(const std::string& name) {
     std::string result;
     base::FilePath cert_path = GetTestCertsDirectory().AppendASCII(name);
-    EXPECT_TRUE(file_util::ReadFileToString(cert_path, &result));
+    EXPECT_TRUE(base::ReadFileToString(cert_path, &result));
     return result;
   }
 
   static bool ReadCertIntoList(const std::string& name,
                                CertificateList* certs) {
     scoped_refptr<X509Certificate> cert(
         ImportCertFromFile(GetTestCertsDirectory(), name));
     if (!cert.get())
       return false;
 
@@ skipping 951 matching lines @@
   EXPECT_EQ(NSSCertDatabase::TRUST_DEFAULT,
             cert_db_->GetCertTrust(certs2[0].get(), SERVER_CERT));
 
   new_certs = ListCertsInSlot(slot_->os_module_handle());
   ASSERT_EQ(2U, new_certs.size());
   EXPECT_STRNE(new_certs[0]->os_cert_handle()->nickname,
                new_certs[1]->os_cert_handle()->nickname);
 }
 
 }  // namespace net