Move ReadFileToString to the base namespace.

chrome/test/base/module_system_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 "chrome/test/base/module_system_test.h"
 
 #include "base/callback.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/lazy_instance.h"
@@ skipping 154 matching lines @@
   module_system_->OverrideNativeHandlerForTest(name);
 }
 
 void ModuleSystemTest::RegisterTestFile(const std::string& module_name,
                                         const std::string& file_name) {
   base::FilePath test_js_file_path;
   ASSERT_TRUE(PathService::Get(chrome::DIR_TEST_DATA, &test_js_file_path));
   test_js_file_path = test_js_file_path.AppendASCII("extensions")
                                        .AppendASCII(file_name);
   std::string test_js;
-  ASSERT_TRUE(file_util::ReadFileToString(test_js_file_path, &test_js));
+  ASSERT_TRUE(base::ReadFileToString(test_js_file_path, &test_js));
   source_map_->RegisterModule(module_name, test_js);
 }
 
 void ModuleSystemTest::TearDown() {
   // All tests must assert at least once unless otherwise specified.
   EXPECT_EQ(should_assertions_be_made_,
             assert_natives_->assertion_made());
   EXPECT_FALSE(assert_natives_->failed());
 }
 
 void ModuleSystemTest::ExpectNoAssertionsMade() {
   should_assertions_be_made_ = false;
 }
 
 v8::Handle<v8::Object> ModuleSystemTest::CreateGlobal(const std::string& name) {
   v8::HandleScope handle_scope;
   v8::Handle<v8::Object> object = v8::Object::New();
   v8::Context::GetCurrent()->Global()->Set(v8::String::New(name.c_str()),
                                            object);
   return handle_scope.Close(object);
 }